diff --git a/paddle/fluid/inference/analysis/argument.h b/paddle/fluid/inference/analysis/argument.h
index e69a1e0e1ffb0b723f80362efad680a96533564d..717737749a96beb220d271e96051d2ce8c4addc2 100644
--- a/paddle/fluid/inference/analysis/argument.h
+++ b/paddle/fluid/inference/analysis/argument.h
@@ -331,6 +331,9 @@ struct Argument {
 
   // mixed precision related
   DECL_ARGUMENT_FIELD(model_precision, ModelPrecision, int);
+  DECL_ARGUMENT_FIELD(mixed_black_list,
+                      MixedBlackList,
+                      std::unordered_set<std::string>);
 
  private:
   std::unordered_set<std::string> valid_fields_;
diff --git a/paddle/fluid/inference/analysis/ir_pass_manager.cc b/paddle/fluid/inference/analysis/ir_pass_manager.cc
index 4aeaefa3c49c3ff5ed715803b879123f799fb2b9..3c04638003cdd0c31c1e9f3aeb1cd9cf07130db6 100644
--- a/paddle/fluid/inference/analysis/ir_pass_manager.cc
+++ b/paddle/fluid/inference/analysis/ir_pass_manager.cc
@@ -87,6 +87,9 @@ void IRPassManager::CreatePasses(Argument *argument,
     pass->Set("with_dynamic_shape", new bool(with_dynamic_shape));
 
     pass->Set("model_precision", new int(argument->model_precision()));
+    pass->Set(
+        "mixed_black_list",
+        new std::unordered_set<std::string>(argument->mixed_black_list()));
 
     if (pass_name == "graph_viz_pass") {
       std::string optim_cache_dir = argument->optim_cache_dir();
diff --git a/paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc b/paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc
index 7a9c5b889d14621e2947333f07da97002bf44dca..d39eadc7cc8f19d95719a7103a8dd5a5db6aa340 100644
--- a/paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc
+++ b/paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc
@@ -13,26 +13,117 @@
 // limitations under the License.
 
 #include "paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.h"
+#include <cstddef>
+#include <string>
+#include <unordered_set>
 
+#include "paddle/fluid/framework/block_desc.h"
+#include "paddle/fluid/framework/framework.pb.h"
+#include "paddle/fluid/framework/ir/graph_helper.h"
 #include "paddle/fluid/framework/ir/graph_pattern_detector.h"
+#include "paddle/fluid/framework/ir/graph_viz_pass.h"
+#include "paddle/fluid/framework/ir/node.h"
 #include "paddle/fluid/framework/ir/subgraph_detector.h"
 #include "paddle/fluid/framework/op_version_registry.h"
 #include "paddle/fluid/inference/analysis/helper.h"
+#include "paddle/fluid/inference/analysis/passes/convert_to_mixed_precision.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/engine.h"
 #include "paddle/fluid/inference/tensorrt/helper.h"
 #include "paddle/fluid/inference/tensorrt/op_teller.h"
 #include "paddle/fluid/inference/utils/io_utils.h"
+#include "paddle/phi/common/backend.h"
+#include "paddle/phi/common/data_type.h"
 
 namespace paddle {
 namespace inference {
 namespace analysis {
+namespace {
+
+bool IsFloat(framework::proto::VarType::Type t) {
+  if (t == framework::proto::VarType::FP16 ||
+      t == framework::proto::VarType::FP32 ||
+      t == framework::proto::VarType::FP64 ||
+      t == framework::proto::VarType::BF16)
+    return true;
+  return false;
+}
+
+// if in mixed model precision, we should make all tensorrt_engine's output
+// floats dtype to float32 dtype.
+void OutputProcess(framework::ir::Graph *graph,
+                   const std::unordered_set<framework::ir::Node *> &trt_outputs,
+                   phi::Backend backend,
+                   phi::DataType precision,
+                   const std::unordered_set<std::string> &blacklist) {
+  framework::BlockDesc *block_desc{nullptr};
+  int suffix = 0;
+  std::unordered_map<framework::ir::Node *, framework::ir::Node *>
+      var_to_cast_op_map;
+
+  framework::proto::VarType::Type to_type;
+  if (precision == phi::DataType::FLOAT16) {
+    to_type = framework::proto::VarType::FP16;
+  } else if (precision == phi::DataType::BFLOAT16) {
+    to_type = framework::proto::VarType::BF16;
+  } else if (precision == phi::DataType::FLOAT32) {
+    return;
+  } else {
+    PADDLE_THROW(paddle::platform::errors::InvalidArgument(
+        "mixed_precision currently not supported dtype %d, we now only support "
+        "fp16 and bf16.",
+        static_cast<int>(precision)));
+  }
+
+  for (auto *op_node : framework::ir::TopologySortOperations(*graph)) {
+    if (!op_node->IsOp()) continue;
+    auto op_type = op_node->Op()->Type();
+    if (op_type == "feed") block_desc = op_node->Op()->Block();
+    if (op_type != "tensorrt_engine") continue;
+    for (auto *var_node : op_node->outputs) {
+      if (!trt_outputs.count(var_node)) continue;
+      if (!var_node->Var()->Persistable() &&
+          IsFloat(var_node->Var()->GetDataType()) &&
+          var_node->Var()->GetDataType() != framework::proto::VarType::FP32) {
+        for (auto *next_op : var_node->outputs) {
+          // if next_op support mixed_precision, we need to add cast op.
+          if (OpSupportPrecision(
+                  phi::TransToPhiKernelName(next_op->Op()->Type()),
+                  backend,
+                  precision,
+                  blacklist)) {
+            AddCastOp(graph,
+                      var_node,
+                      next_op,
+                      framework::proto::VarType::FP32,
+                      to_type,
+                      &suffix,
+                      block_desc,
+                      &var_to_cast_op_map);
+            var_node->Var()->SetDataType(framework::proto::VarType::FP32);
+          }
+        }
+      }
+    }
+  }
+}
+
+}  // namespace
 
 using framework::ir::Node;
 
 void analysis::TensorRtSubgraphPass::ApplyImpl(
     framework::ir::Graph *graph) const {
   framework::ir::FusePassBase::Init("tensorrt_subgraph_pass", graph);
+
+  auto model_precision =
+      static_cast<phi::DataType>(Get<int>("model_precision"));
+  if (model_precision == phi::DataType::BFLOAT16) {
+    LOG(WARNING)
+        << "Paddle-TRT not support bf16 mixed precison, just fallback.";
+    return;
+  }
+
   auto enable_int8 = Get<bool>("enable_int8");
   auto use_calib_mode = Get<bool>("use_calib_mode");
   bool no_calib_int8 = enable_int8 && !(use_calib_mode);
@@ -181,15 +272,25 @@ void TensorRtSubgraphPass::CreateTensorRTOp(
     }
   }
 
+  auto model_precision =
+      static_cast<phi::DataType>(Get<int>("model_precision"));
+  auto mixed_black_list =
+      Get<std::unordered_set<std::string>>("mixed_black_list");
+
   std::set<std::string> output_names;
   std::set<std::string> output_names_with_id;
   std::map<std::string, int> origin_name_output_dims;
+  std::unordered_set<Node *> trt_outputs;
   for (auto *x : node->outputs) {
     output_names.insert(x->Name());
     output_names_with_id.insert(x->Name() + std::to_string(x->id()));
     origin_name_output_dims[x->Name()] = x->Var()->GetShape().size();
+    trt_outputs.insert(x);
   }
 
+  OutputProcess(
+      graph, trt_outputs, phi::Backend::GPU, model_precision, mixed_black_list);
+
   std::unordered_map<std::string, std::string> output_name_map;
   std::unordered_map<std::string, framework::ir::Node *> graph_var_map;
 
@@ -285,6 +386,7 @@ void TensorRtSubgraphPass::CreateTensorRTOp(
   op_desc->SetAttr("allow_build_at_runtime", allow_build_at_runtime);
   op_desc->SetAttr("shape_range_info_path", shape_range_info_path);
   op_desc->SetAttr("use_inspector", Get<bool>("use_inspector"));
+  op_desc->SetAttr("model_precision", Get<int>("model_precision"));
 
   // we record all inputs' shapes in attr to check if they are consistent
   // with the real inputs' shapes retrieved from scope when trt runs.
@@ -404,7 +506,8 @@ void TensorRtSubgraphPass::CreateTensorRTOp(
                   min_input_shape,
                   max_input_shape,
                   opt_input_shape,
-                  disable_trt_plugin_fp16);
+                  disable_trt_plugin_fp16,
+                  static_cast<phi::DataType>(Get<int>("model_precision")));
   trt_engine->SetUseOSS(Get<bool>("use_varseqlen"));
   trt_engine->SetWithInterleaved(Get<bool>("with_interleaved"));
   trt_engine->SetTransformerPosid(
diff --git a/paddle/fluid/inference/analysis/passes/convert_to_mixed_precision.cc b/paddle/fluid/inference/analysis/passes/convert_to_mixed_precision.cc
index 44e36647646fe44ae9f5cb9d61f5239d72270612..bc753636d2c1a175f98cd36af3c63bde55558dc3 100644
--- a/paddle/fluid/inference/analysis/passes/convert_to_mixed_precision.cc
+++ b/paddle/fluid/inference/analysis/passes/convert_to_mixed_precision.cc
@@ -18,6 +18,7 @@
 
 #include "paddle/fluid/framework/block_desc.h"
 #include "paddle/fluid/framework/executor.h"
+#include "paddle/fluid/framework/framework.pb.h"
 #include "paddle/fluid/framework/ir/graph.h"
 #include "paddle/fluid/framework/ir/graph_helper.h"
 #include "paddle/fluid/framework/ir/graph_pattern_detector.h"
@@ -379,27 +380,21 @@ void ConvertToMixedPrecision(const std::string& model_file,
   };
 
   std::unordered_set<std::string> weights_should_be_fp32;
-  for (auto* node : paddle::framework::ir::TopologySortOperations(*graph)) {
-    if (!node->IsOp()) continue;
-    auto* op_desc = node->Op();
-    if (op_desc->Type() == "feed" || op_desc->Type() == "fetch") continue;
-
-    if (op_desc->Type() == "batch_norm") {
-      auto vecs = op_desc->Input("Bias");
-      for (auto s : vecs) {
-        weights_should_be_fp32.insert(s);
-      }
-      vecs = op_desc->Input("Mean");
-      for (auto s : vecs) {
-        weights_should_be_fp32.insert(s);
-      }
-      vecs = op_desc->Input("Scale");
-      for (auto s : vecs) {
-        weights_should_be_fp32.insert(s);
-      }
-      vecs = op_desc->Input("Variance");
-      for (auto s : vecs) {
-        weights_should_be_fp32.insert(s);
+  for (auto* node : graph->Nodes()) {
+    if (!node->IsVar()) continue;
+    if (node->Var()->GetType() ==
+            paddle::framework::proto::VarType::SELECTED_ROWS ||
+        node->Var()->GetType() ==
+            paddle::framework::proto::VarType::LOD_TENSOR ||
+        node->Var()->GetType() ==
+            paddle::framework::proto::VarType::LOD_TENSOR_ARRAY ||
+        node->Var()->GetType() == paddle::framework::proto::VarType::STRINGS ||
+        node->Var()->GetType() == paddle::framework::proto::VarType::VOCAB) {
+      if (node->Var()->Persistable() &&
+          node->Var()->GetDataType() ==
+              paddle::framework::proto::VarType::FP32) {
+        VLOG(2) << "weights keep to fp32: " << node->Name();
+        weights_should_be_fp32.insert(node->Name());
       }
     }
   }
diff --git a/paddle/fluid/inference/api/analysis_config.cc b/paddle/fluid/inference/api/analysis_config.cc
index 75a5d9ee4f55b9971bdda7d5241a9824135dc1fa..ae90618f5207cd8100bc5460e63e9c796a2dc3ba 100644
--- a/paddle/fluid/inference/api/analysis_config.cc
+++ b/paddle/fluid/inference/api/analysis_config.cc
@@ -256,6 +256,9 @@ AnalysisConfig::AnalysisConfig(const AnalysisConfig &other) {
   CP_MEMBER(gpu_device_id_);
   CP_MEMBER(memory_pool_init_size_mb_);
 
+  // Mixed related.
+  CP_MEMBER(mixed_black_list_);
+
   CP_MEMBER(enable_memory_optim_);
   // TensorRT related.
   CP_MEMBER(use_tensorrt_);
@@ -871,6 +874,7 @@ std::string AnalysisConfig::SerializeInfoCache() {
   ss << ipu_available_memory_proportion_;
   ss << ipu_enable_half_partial_;
 
+  for (auto &op : mixed_black_list_) ss << op.c_str();
   return ss.str();
 }
 
@@ -1188,4 +1192,10 @@ bool AnalysisConfig::tuned_tensorrt_dynamic_shape() {
 bool AnalysisConfig::trt_allow_build_at_runtime() {
   return trt_allow_build_at_runtime_;
 }
+
+void AnalysisConfig::Exp_SetBlackListOpsForMixedModel(
+    const std::unordered_set<std::string> &black_list) {
+  mixed_black_list_ = black_list;
+}
+
 }  // namespace paddle
diff --git a/paddle/fluid/inference/api/analysis_predictor.cc b/paddle/fluid/inference/api/analysis_predictor.cc
index 62f89e300bfbda54fb6da47d5deb1dc9417c4db9..d008355e0ed5bb384e23d59460f4d6ca072f1d85 100644
--- a/paddle/fluid/inference/api/analysis_predictor.cc
+++ b/paddle/fluid/inference/api/analysis_predictor.cc
@@ -1216,7 +1216,9 @@ void AnalysisPredictor::PrepareArgument() {
   argument_.SetAnalysisPasses(config_.pass_builder()->AnalysisPasses());
   argument_.SetScopeNotOwned(scope_.get());
 
+  // mixed precison.
   argument_.SetModelPrecision(static_cast<int>(model_precision_));
+  argument_.SetMixedBlackList(config_.mixed_black_list_);
 }
 
 // NOTE All the members in AnalysisConfig should be copied to Argument.
diff --git a/paddle/fluid/inference/api/paddle_analysis_config.h b/paddle/fluid/inference/api/paddle_analysis_config.h
index 6de23e930836aff03c544a08ab123724f0277b91..08d0e073babc18c5691be32a5642efaa15ff098d 100644
--- a/paddle/fluid/inference/api/paddle_analysis_config.h
+++ b/paddle/fluid/inference/api/paddle_analysis_config.h
@@ -914,6 +914,14 @@ struct PD_INFER_DECL AnalysisConfig {
 
   const DistConfig& dist_config() const { return dist_config_; }
 
+  ///
+  /// \brief Set a list of operators that do not support mixed precision. This
+  /// interface is in the experimental stage and may change in the future. Note
+  /// that the blacklist must be the same as the model conversion blacklist.
+  ///
+  void Exp_SetBlackListOpsForMixedModel(
+      const std::unordered_set<std::string>& black_list);
+
  protected:
   // Update the config.
   void Update();
@@ -926,6 +934,9 @@ struct PD_INFER_DECL AnalysisConfig {
   mutable std::string prog_file_;
   mutable std::string params_file_;
 
+  // Mixed precision.
+  std::unordered_set<std::string> mixed_black_list_;
+
   // GPU related.
   bool use_gpu_{false};
   int gpu_device_id_{0};
diff --git a/paddle/fluid/inference/api/paddle_pass_builder.cc b/paddle/fluid/inference/api/paddle_pass_builder.cc
index 73c216290dd88e3aa8d59d4ab53172e7e8eff80a..0d918446ea92aafa524f73615224613a4bf67e15 100644
--- a/paddle/fluid/inference/api/paddle_pass_builder.cc
+++ b/paddle/fluid/inference/api/paddle_pass_builder.cc
@@ -160,6 +160,10 @@ const std::vector<std::string> kGpuLowerPrecisionPasses{
 const std::vector<std::string> kTrtLowerPrecisionPasses{
     // "conv_bn_fuse_pass",
     // "conv_eltwiseadd_bn_fuse_pass",
+    "trt_map_matmul_v2_to_mul_pass",
+    "trt_map_matmul_v2_to_matmul_pass",
+    "trt_map_matmul_to_mul_pass",
+    "fc_fuse_pass",
     "tensorrt_subgraph_pass",
 };
 
diff --git a/paddle/fluid/inference/tensorrt/convert/affine_channel_op.cc b/paddle/fluid/inference/tensorrt/convert/affine_channel_op.cc
index 44283f4e0d7e960b58d0ac464c1f8a4cbe1191b8..017fa8800b4589e8838e1b809c85c7c74eb2eb01 100644
--- a/paddle/fluid/inference/tensorrt/convert/affine_channel_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/affine_channel_op.cc
@@ -50,22 +50,26 @@ class AffineChannelOpConverter : public OpConverter {
 
     auto* scale_v = scope.FindVar(scale_name);
     auto* scale_t = scale_v->GetMutable<framework::LoDTensor>();
-    float* scale_ptr = engine_->GetWeightCPUData(scale_name, scale_t);
+    float* scale_ptr = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(scale_name, *scale_t).get().values));
 
     auto* bias_v = scope.FindVar(bias_name);
     auto* bias_t = bias_v->GetMutable<framework::LoDTensor>();
-    float* bias_ptr = engine_->GetWeightCPUData(bias_name, bias_t);
+    float* bias_ptr = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(bias_name, *bias_t).get().values));
 
     // tensorrt scalend layer only support spatial dims >= 2,
     // so nhwc is not availabe (spatial dims == 0)
     const int channel_axis = engine_->with_dynamic_shape();
 
-    TensorRTEngine::Weight scale_weights{nvinfer1::DataType::kFLOAT,
-                                         static_cast<void*>(scale_ptr),
-                                         (size_t)idim.d[channel_axis]};
-    TensorRTEngine::Weight bias_weights{nvinfer1::DataType::kFLOAT,
-                                        static_cast<void*>(bias_ptr),
-                                        (size_t)idim.d[channel_axis]};
+    TensorRTEngine::Weight scale_weights{
+        nvinfer1::DataType::kFLOAT,
+        static_cast<void*>(scale_ptr),
+        static_cast<size_t>(idim.d[channel_axis])};
+    TensorRTEngine::Weight bias_weights{
+        nvinfer1::DataType::kFLOAT,
+        static_cast<void*>(bias_ptr),
+        static_cast<size_t>(idim.d[channel_axis])};
     TensorRTEngine::Weight power_weights{
         nvinfer1::DataType::kFLOAT, nullptr, 0};
 
diff --git a/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc b/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc
index 244078dc344a289c58b057c17e9de1434644ec3d..c47f6d03cd5432c859a8d522587990841d6e17e3 100644
--- a/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc
@@ -13,6 +13,8 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/engine.h"
+#include "paddle/phi/common/data_type.h"
 
 namespace paddle {
 namespace framework {
@@ -48,7 +50,7 @@ void ConvertConv2d(TensorRTEngine* engine,
       platform::errors::NotFound("Can not find %s presistale var in scope.",
                                  filter_var_name));
   auto* Y_t = Y_v->GetMutable<framework::LoDTensor>();
-  float* weight_data = nullptr;
+
   bool enable_int8 = op_desc.HasAttr("enable_int8");
 
   if (enable_int8) {
@@ -57,7 +59,6 @@ void ConvertConv2d(TensorRTEngine* engine,
     engine->SetTensorDynamicRange(X, in_scale);
 #endif
   }
-  weight_data = engine->GetWeightCPUData(op_desc.Input("Filter").front(), Y_t);
 
   PADDLE_ENFORCE_EQ(Y_t->dims().size(),
                     4UL,
@@ -104,21 +105,19 @@ void ConvertConv2d(TensorRTEngine* engine,
     nv_post_paddings.d[1] = paddings[3];
   }
 
-  TensorRTEngine::Weight weight{nvinfer1::DataType::kFLOAT,
-                                static_cast<void*>(weight_data),
-                                static_cast<size_t>(Y_t->numel())};
-  float* bias_data = nullptr;
-  size_t bias_size = 0;
+  auto weight = engine->GetTrtWeight(op_desc.Input("Filter").front(), *Y_t);
+
+  TensorRTEngine::Weight bias;
+  bias.SetDataType(weight.get().type);
+  bias.SetCount(0);
+  bias.SetValues(nullptr);
   if (op_desc.Type() == "conv2d_fusion") {
     auto* bias_tensor = scope.GetVar(op_desc.Input("Bias").front());
     auto* bias_tensor_data = bias_tensor->GetMutable<framework::LoDTensor>();
-    bias_data = engine->GetWeightCPUData(op_desc.Input("Bias").front(),
-                                         bias_tensor_data);
-    bias_size = static_cast<size_t>(bias_tensor_data->numel());
+    bias =
+        engine->GetTrtWeight(op_desc.Input("Bias").front(), *bias_tensor_data);
   }
 
-  TensorRTEngine::Weight bias{
-      nvinfer1::DataType::kFLOAT, static_cast<void*>(bias_data), bias_size};
   // In conv2d_transpose and depthwise_conv2d_transpose,
   // output channels = filter_dims[1] * groups
   auto* layer = (op_desc.Type() == "conv2d_transpose" ||
diff --git a/paddle/fluid/inference/tensorrt/convert/conv3d_op.cc b/paddle/fluid/inference/tensorrt/convert/conv3d_op.cc
index 7308d44bf8320b1bf47fdc75cd34d5bf8d2e77e4..4ffc8056547272bdc1752e98edc2bb2b5bb313e3 100644
--- a/paddle/fluid/inference/tensorrt/convert/conv3d_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/conv3d_op.cc
@@ -48,14 +48,12 @@ void ConvertConv3d(TensorRTEngine* engine,
       platform::errors::NotFound("Can not find %s presistale var in scope.",
                                  filter_var_name));
   auto* Y_t = Y_v->GetMutable<framework::LoDTensor>();
-  float* weight_data = nullptr;
   bool enable_int8 = op_desc.HasAttr("enable_int8");
 
   if (enable_int8) {
     float in_scale = BOOST_GET_CONST(float, op_desc.GetAttr("Input_scale"));
     engine->SetTensorDynamicRange(X, in_scale);
   }
-  weight_data = engine->GetWeightCPUData(op_desc.Input("Filter").front(), Y_t);
 
   PADDLE_ENFORCE_EQ(Y_t->dims().size(),
                     5UL,
@@ -85,14 +83,12 @@ void ConvertConv3d(TensorRTEngine* engine,
   nvinfer1::Dims3 nv_strides(strides[0], strides[1], strides[2]);
   nvinfer1::Dims3 nv_paddings(paddings[0], paddings[1], paddings[2]);
 
-  TensorRTEngine::Weight weight{nvinfer1::DataType::kFLOAT,
-                                static_cast<void*>(weight_data),
-                                static_cast<size_t>(Y_t->numel())};
+  auto weight = engine->GetTrtWeight(op_desc.Input("Filter").front(), *Y_t);
   float* bias_data = nullptr;
   size_t bias_size = 0;
 
   TensorRTEngine::Weight bias{
-      nvinfer1::DataType::kFLOAT, static_cast<void*>(bias_data), bias_size};
+      weight.get().type, static_cast<void*>(bias_data), bias_size};
   // In conv3d_transpose output channels = filter_dims[1] * groups
   auto* layer = (op_desc.Type() == "conv3d_transpose")
                     ? fadd_layer(X, n_input * groups, nv_ksize, weight, bias)
diff --git a/paddle/fluid/inference/tensorrt/convert/deformable_conv_op.cc b/paddle/fluid/inference/tensorrt/convert/deformable_conv_op.cc
index f0a82bebc7ca92d3c34000c2a000fcff95bd5923..8cf7f6528e5950f011c7b264e0be465d05ae6a7c 100644
--- a/paddle/fluid/inference/tensorrt/convert/deformable_conv_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/deformable_conv_op.cc
@@ -49,8 +49,6 @@ class DeformableConvOpConverter : public OpConverter {
     auto* filter_var = scope.FindVar(filter_name);
     auto* filter_tensor = filter_var->GetMutable<framework::LoDTensor>();
 
-    float* filter_data = engine_->GetWeightCPUData(filter_name, filter_tensor);
-
     const int c_o = filter_tensor->dims()[0];
     const int c_i = filter_tensor->dims()[1];
     const int k_h = filter_tensor->dims()[2];
@@ -73,15 +71,20 @@ class DeformableConvOpConverter : public OpConverter {
     weights.count = filter_tensor->numel();
     bool with_fp16 = engine_->WithFp16() && !engine_->disable_trt_plugin_fp16();
     if (with_fp16) {
-      auto half_filter_data = new half[filter_tensor->numel()];
-      for (int i = 0; i < filter_tensor->numel(); i++) {
-        half_filter_data[i] = static_cast<half>(filter_data[i]);
+      auto filter_weight = engine_->GetTrtWeight(filter_name, *filter_tensor);
+      if (filter_weight.get().type == nvinfer1::DataType::kFLOAT) {
+        auto half_filter_data = new half[filter_tensor->numel()];
+        for (int i = 0; i < filter_tensor->numel(); i++) {
+          half_filter_data[i] = static_cast<half>(
+              static_cast<const float*>(filter_weight.get().values)[i]);
+        }
+        weights.type = nvinfer1::DataType::kHALF;
+        weights.values = half_filter_data;
+      } else if (filter_weight.get().type == nvinfer1::DataType::kHALF) {
+        weights = filter_weight.get();
       }
-      weights.type = nvinfer1::DataType::kHALF;
-      weights.values = half_filter_data;
     } else {
-      weights.type = nvinfer1::DataType::kFLOAT;
-      weights.values = filter_data;
+      weights = engine_->GetFp32TrtWeight(filter_name, *filter_tensor).get();
     }
     auto* deformable_conv_plugin = new plugin::DeformableConvPlugin(
         with_fp16 ? nvinfer1::DataType::kHALF : nvinfer1::DataType::kFLOAT,
diff --git a/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc b/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
index aff23343a078fd2732d74556d88436e4d4cfe648..365523508f5dfafc92d4a9edcfcafef4796316de 100644
--- a/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
@@ -33,12 +33,9 @@ class ElementwiseTensorOpConverter : public OpConverter {
     if (Y_v) {
       // Y is weight
       auto* Y_t = Y_v->GetMutable<framework::LoDTensor>();
-      float* weight_data =
-          engine_->GetWeightCPUData(op_desc.Input("Y").front(), Y_t);
       std::vector<int> dims_y = phi::vectorize<int>(Y_t->dims());
-      TensorRTEngine::Weight y_weight{nvinfer1::DataType::kFLOAT,
-                                      static_cast<void*>(weight_data),
-                                      static_cast<size_t>(Y_t->numel())};
+      auto y_weight = engine_->GetTrtWeight(op_desc.Input("Y").front(), *Y_t);
+
       nvinfer1::Dims trt_dims_y;
       trt_dims_y.nbDims = dims_y.size();
       for (int i = 0; i < trt_dims_y.nbDims; i++) {
diff --git a/paddle/fluid/inference/tensorrt/convert/emb_eltwise_layernorm.cc b/paddle/fluid/inference/tensorrt/convert/emb_eltwise_layernorm.cc
index 1a1f72388e40e35a6346b5109334bdcca8a22131..5020b9762775307ce0564d875f042f9cc958af84 100644
--- a/paddle/fluid/inference/tensorrt/convert/emb_eltwise_layernorm.cc
+++ b/paddle/fluid/inference/tensorrt/convert/emb_eltwise_layernorm.cc
@@ -10,8 +10,11 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/convert/utils.h"
+#include "paddle/fluid/inference/tensorrt/engine.h"
 #include "paddle/fluid/inference/tensorrt/helper.h"
 #include "paddle/fluid/inference/tensorrt/plugin/emb_eltwise_layernorm_plugin.h"
+#include "paddle/phi/core/ddim.h"
 
 namespace paddle {
 namespace framework {
@@ -73,27 +76,39 @@ class EmbEltwiseLayerNormOpConverter : public OpConverter {
     // input_embs[0]: word_embedding
     // input_embs[1]: pos_embedding
     // input_embs[2]: sent_embedding
-    std::vector<float*> input_embs;
+    std::vector<nvinfer1::Weights> input_embs;
     std::vector<int> emb_sizes;
 
     // get the presistable var's data
-    auto get_persistable_data = [&](const std::string& var_name,
-                                    framework::DDim* dims) -> float* {
+    auto GetWeight = [&](const std::string& var_name,
+                         framework::DDim* dim) -> TensorRTEngine::Weight {
       auto* temp_var = scope.FindVar(var_name);
       auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
-      (*dims) = temp_tensor->dims();
+      *dim = temp_tensor->dims();
+      auto weight = engine_->GetTrtWeight(var_name, *temp_tensor);
+      return weight;
+    };
 
-      auto* temp_data = engine_->GetWeightCPUData(var_name, temp_tensor);
-      return temp_data;
+    auto GetFp32Weight = [&](const std::string& var_name,
+                             framework::DDim* dim) -> TensorRTEngine::Weight {
+      auto* temp_var = scope.FindVar(var_name);
+      auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
+      *dim = temp_tensor->dims();
+      auto weight = engine_->GetFp32TrtWeight(var_name, *temp_tensor);
+      return weight;
     };
 
     int hidden = 0;
     for (int i = 0; i < input_num; i++) {
       framework::DDim emb_dims;
-      float* emb_data = get_persistable_data(emb_names[i], &emb_dims);
-      int64_t emb_size = phi::product(emb_dims);
-      input_embs.push_back(emb_data);
-      emb_sizes.push_back(emb_size);
+      TensorRTEngine::Weight weight;
+      if (flag_varseqlen) {
+        weight = GetWeight(emb_names[i], &emb_dims);
+      } else {
+        weight = GetFp32Weight(emb_names[i], &emb_dims);
+      }
+      input_embs.push_back(weight.get());
+      emb_sizes.push_back(weight.get().count);
       PADDLE_ENFORCE_EQ(
           emb_dims.size(),
           2,
@@ -103,11 +118,15 @@ class EmbEltwiseLayerNormOpConverter : public OpConverter {
     }
 
     framework::DDim bias_dims, scale_dims;
+    TensorRTEngine::Weight bias_weight, scale_weight;
+    if (flag_varseqlen) {
+      bias_weight = GetWeight(op_desc.Input("Bias").front(), &bias_dims);
+      scale_weight = GetWeight(op_desc.Input("Scale").front(), &scale_dims);
+    } else {
+      bias_weight = GetFp32Weight(op_desc.Input("Bias").front(), &bias_dims);
+      scale_weight = GetFp32Weight(op_desc.Input("Scale").front(), &scale_dims);
+    }
 
-    auto* bias =
-        get_persistable_data(op_desc.Input("Bias").front(), &bias_dims);
-    auto* scale =
-        get_persistable_data(op_desc.Input("Scale").front(), &scale_dims);
     int64_t bias_size = phi::product(bias_dims);
     int64_t scale_size = phi::product(scale_dims);
     nvinfer1::ILayer* layer = nullptr;
@@ -134,24 +153,24 @@ class EmbEltwiseLayerNormOpConverter : public OpConverter {
               "But Precision::KFloat32 is setted."));
       const std::vector<nvinfer1::PluginField> fields{
           {"bert_embeddings_layernorm_beta",
-           bias,
-           nvinfer1::PluginFieldType::kFLOAT32,
+           bias_weight.get().values,
+           GetPluginFieldType(bias_weight.get().type),
            static_cast<int32_t>(bias_size)},
           {"bert_embeddings_layernorm_gamma",
-           scale,
-           nvinfer1::PluginFieldType::kFLOAT32,
+           scale_weight.get().values,
+           GetPluginFieldType(scale_weight.get().type),
            static_cast<int32_t>(scale_size)},
           {"bert_embeddings_word_embeddings",
-           input_embs[0],
-           nvinfer1::PluginFieldType::kFLOAT32,
+           input_embs[0].values,
+           GetPluginFieldType(input_embs[0].type),
            static_cast<int32_t>(emb_sizes[0])},
           {"bert_embeddings_token_type_embeddings",
-           input_embs[2],
-           nvinfer1::PluginFieldType::kFLOAT32,
+           input_embs[2].values,
+           GetPluginFieldType(input_embs[2].type),
            static_cast<int32_t>(emb_sizes[2])},
           {"bert_embeddings_position_embeddings",
-           input_embs[1],
-           nvinfer1::PluginFieldType::kFLOAT32,
+           input_embs[1].values,
+           GetPluginFieldType(input_embs[1].type),
            static_cast<int32_t>(emb_sizes[1])},
           {"output_fp16", &output_fp16, nvinfer1::PluginFieldType::kINT32, 1},
       };
@@ -235,15 +254,23 @@ class EmbEltwiseLayerNormOpConverter : public OpConverter {
           engine_->WithFp16() && !engine_->disable_trt_plugin_fp16();
       float eps = BOOST_GET_CONST(float, op_desc.GetAttr("epsilon"));
       plugin::DynamicPluginTensorRT* plugin = nullptr;
-      plugin = new plugin::EmbEltwiseLayernormPluginDynamic(input_embs,
-                                                            bias,
-                                                            scale,
-                                                            emb_sizes,
-                                                            bias_size,
-                                                            scale_size,
-                                                            hidden,
-                                                            eps,
-                                                            with_fp16);
+      std::vector<float*> input_embs_data;
+      for (size_t i = 0; i < input_embs.size(); ++i) {
+        input_embs_data.push_back(const_cast<float*>(
+            static_cast<const float*>(input_embs[i].values)));
+      }
+      plugin = new plugin::EmbEltwiseLayernormPluginDynamic(
+          input_embs_data,
+          const_cast<float*>(
+              static_cast<const float*>(bias_weight.get().values)),
+          const_cast<float*>(
+              static_cast<const float*>(scale_weight.get().values)),
+          emb_sizes,
+          bias_size,
+          scale_size,
+          hidden,
+          eps,
+          with_fp16);
       layer = engine_->AddDynamicPlugin(input_ids.data(), input_num, plugin);
       auto output_name = op_desc.Output("Out")[0];
       RreplenishLayerAndOutput(
diff --git a/paddle/fluid/inference/tensorrt/convert/fc_op.cc b/paddle/fluid/inference/tensorrt/convert/fc_op.cc
index ce6644cad4200f10a3e432469fda6c964dd7a94f..1bd9cf8712d989be5acb90747c761891e9226ab4 100644
--- a/paddle/fluid/inference/tensorrt/convert/fc_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/fc_op.cc
@@ -27,6 +27,16 @@ class OpDesc;
 namespace paddle {
 namespace inference {
 namespace tensorrt {
+namespace {
+template <typename T>
+void tranpose_weight(const T* src, T* dst, int m, int n) {
+  for (int i = 0; i < m; i++) {
+    for (int j = 0; j < n; j++) {
+      dst[j * m + i] = src[i * n + j];
+    }
+  }
+}
+}  // namespace
 
 /*
  * FC converter convert a MUL op in Fluid to a FC layer in TRT.
@@ -156,9 +166,7 @@ class FcOpConverter : public OpConverter {
         op_desc.HasAttr("activation_type")
             ? BOOST_GET_CONST(std::string, op_desc.GetAttr("activation_type"))
             : "";
-    // This may trigger a GPU->CPU copy, because TRT's weight can only be
-    // assigned from CPU memory, which can't be avoided.
-    float* weight_data = nullptr;
+
     bool enable_int8 = op_desc.HasAttr("enable_int8");
     bool support_int8 = false;
     if (op_desc.HasAttr("support_int8")) {
@@ -173,7 +181,6 @@ class FcOpConverter : public OpConverter {
       }
       engine_->SetTensorDynamicRange(X, in_scale);
     }
-    weight_data = engine_->GetWeightCPUData(op_desc.Input(w_name).front(), Y_t);
 
     PADDLE_ENFORCE_EQ(Y_t->dims().size(),
                       2UL,
@@ -183,13 +190,6 @@ class FcOpConverter : public OpConverter {
                           Y_t->dims().size()));  // a matrix
     int m = Y_t->dims()[0];
     int n = Y_t->dims()[1];
-    auto tranpose_weight = [](const float* src, float* dst, int m, int n) {
-      for (int i = 0; i < m; i++) {
-        for (int j = 0; j < n; j++) {
-          dst[j * m + i] = src[i * n + j];
-        }
-      }
-    };
 
     auto regist_fc = [&](nvinfer1::ITensor* inputs,
                          int n_output,
@@ -283,11 +283,36 @@ class FcOpConverter : public OpConverter {
       transpose_y = BOOST_GET_CONST(bool, op_desc.GetAttr("transpose_Y"));
     }
     int weight_w, weight_h;
+    auto weight = engine_->GetTrtWeight(op_desc.Input(w_name).front(), *Y_t);
+
     if (!transpose_y) {
-      std::vector<float> weight_data_tmp;
-      weight_data_tmp.reserve(Y_t->numel());
-      memcpy(weight_data_tmp.data(), weight_data, Y_t->numel() * sizeof(float));
-      tranpose_weight(weight_data_tmp.data(), weight_data, m, n);
+      if (weight.get().type == nvinfer1::DataType::kFLOAT) {
+        std::vector<float> weight_data_tmp;
+        weight_data_tmp.reserve(Y_t->numel());
+        memcpy(weight_data_tmp.data(),
+               weight.get().values,
+               Y_t->numel() * sizeof(float));
+        tranpose_weight(
+            weight_data_tmp.data(),
+            const_cast<float*>(static_cast<const float*>(weight.get().values)),
+            m,
+            n);
+      } else if (weight.get().type == nvinfer1::DataType::kHALF) {
+        std::vector<float16> weight_data_tmp;
+        weight_data_tmp.reserve(Y_t->numel());
+        memcpy(weight_data_tmp.data(),
+               weight.get().values,
+               Y_t->numel() * sizeof(float16));
+        tranpose_weight(weight_data_tmp.data(),
+                        const_cast<float16*>(
+                            static_cast<const float16*>(weight.get().values)),
+                        m,
+                        n);
+      } else {
+        PADDLE_THROW(paddle::platform::errors::InvalidArgument(
+            "Paddle-TRT fc convert not supporte dtype, now only support fp32 "
+            "and fp16."));
+      }
       weight_w = n;
       weight_h = m;
     } else {
@@ -295,22 +320,14 @@ class FcOpConverter : public OpConverter {
       weight_h = n;
     }
     size_t n_output = weight_w;
-    TensorRTEngine::Weight weight{nvinfer1::DataType::kFLOAT,
-                                  static_cast<void*>(weight_data),
-                                  static_cast<size_t>(Y_t->numel())};
     weight.dims.assign({weight_w, weight_h});
 
-    float* bias_data = nullptr;
-    int bias_num = 0;
+    TensorRTEngine::Weight bias{weight.get().type, nullptr, 0};
     if (with_bias) {
       auto* b_v = scope.GetVar(op_desc.Input("Bias").front());
       auto* b_t = b_v->GetMutable<framework::LoDTensor>();
-      bias_data = engine_->GetWeightCPUData(op_desc.Input("Bias").front(), b_t);
-      bias_num = b_t->numel();
+      bias = engine_->GetTrtWeight(op_desc.Input("Bias").front(), *b_t);
     }
-    TensorRTEngine::Weight bias{nvinfer1::DataType::kFLOAT,
-                                static_cast<void*>(bias_data),
-                                static_cast<size_t>(bias_num)};
 
     // Running the TRT Static Shape mode: x_num_col_dims-1
     if (!engine_->with_dynamic_shape()) {
diff --git a/paddle/fluid/inference/tensorrt/convert/group_norm_op.cc b/paddle/fluid/inference/tensorrt/convert/group_norm_op.cc
index f5a2026ff6fdf7c872b008bba85a18195a7f81c2..1b45264475354020e6ea4dd733f74bc5da721d28 100644
--- a/paddle/fluid/inference/tensorrt/convert/group_norm_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/group_norm_op.cc
@@ -12,6 +12,7 @@ limitations under the License. */
 #include <vector>
 
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/engine.h"
 
 namespace paddle {
 namespace framework {
@@ -44,30 +45,20 @@ class GroupNormOpConverter : public OpConverter {
     std::string bias_name = op_desc.Input("Bias").front();
 
     // get the presistable var's data
-    auto get_persistable_data = [&](const std::string& var_name,
-                                    framework::DDim* dims) -> float* {
+    auto GetWeight = [&](const std::string& var_name,
+                         framework::DDim* dims) -> TensorRTEngine::Weight {
       auto* temp_var = scope.FindVar(var_name);
       auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
       (*dims) = temp_tensor->dims();
 
-      auto* temp_data = engine_->GetWeightCPUData(var_name, temp_tensor);
-      return temp_data;
+      auto weight = engine_->GetTrtWeight(var_name, *temp_tensor);
+      return weight;
     };
 
     framework::DDim scale_dims;
     framework::DDim bias_dims;
-    float* scale_data = get_persistable_data(scale_name, &scale_dims);
-    float* bias_data = get_persistable_data(bias_name, &bias_dims);
-
-    int64_t scale_numel = phi::product(scale_dims);
-    int64_t bias_numel = phi::product(bias_dims);
-
-    TensorRTEngine::Weight scale_weights{nvinfer1::DataType::kFLOAT,
-                                         static_cast<void*>(scale_data),
-                                         static_cast<size_t>(scale_numel)};
-    TensorRTEngine::Weight bias_weights{nvinfer1::DataType::kFLOAT,
-                                        static_cast<void*>(bias_data),
-                                        static_cast<size_t>(bias_numel)};
+    auto scale_weights = GetWeight(scale_name, &scale_dims);
+    auto bias_weights = GetWeight(bias_name, &bias_dims);
 
     nvinfer1::Dims scale_nv_dims;
     nvinfer1::Dims bias_nv_dims;
diff --git a/paddle/fluid/inference/tensorrt/convert/layer_norm_op.cc b/paddle/fluid/inference/tensorrt/convert/layer_norm_op.cc
index a82101e29f5719e400f79c67901be635ee9d43f7..c899f4f6e777e7c536b511539bea3afb099887d8 100644
--- a/paddle/fluid/inference/tensorrt/convert/layer_norm_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/layer_norm_op.cc
@@ -49,20 +49,10 @@ class LayerNormOpConverter : public OpConverter {
     auto* Bias_t = Bias_v->GetMutable<framework::LoDTensor>();
     auto* Scale_t = Scale_v->GetMutable<framework::LoDTensor>();
 
-    std::unique_ptr<framework::LoDTensor> bias_tensor(
-        new framework::LoDTensor());
-    std::unique_ptr<framework::LoDTensor> scale_tensor(
-        new framework::LoDTensor());
-
-    bias_tensor->Resize(Bias_t->dims());
-    scale_tensor->Resize(Scale_t->dims());
-
-    platform::CPUPlace cpu_place;
-    paddle::framework::TensorCopySync((*Bias_t), cpu_place, &(*bias_tensor));
-    paddle::framework::TensorCopySync((*Scale_t), cpu_place, &(*scale_tensor));
-
-    auto* bias_data = bias_tensor->mutable_data<float>(platform::CPUPlace());
-    auto* scale_data = scale_tensor->mutable_data<float>(platform::CPUPlace());
+    auto bias_weight =
+        engine_->GetFp32TrtWeight(op_desc.Input("Bias").front(), *Bias_t);
+    auto scale_weight =
+        engine_->GetFp32TrtWeight(op_desc.Input("Scale").front(), *Scale_t);
 
     nvinfer1::ILayer* layernorm_layer = nullptr;
     if (engine_->with_dynamic_shape()) {
@@ -73,14 +63,15 @@ class LayerNormOpConverter : public OpConverter {
       std::vector<int64_t> mean_shape{input_num};
       std::vector<int64_t> variance_shape{input_num};
       plugin::LayerNormPluginDynamic* plugin =
-          new plugin::LayerNormPluginDynamic(bias_data,
-                                             bias_tensor->numel(),
-                                             scale_data,
-                                             scale_tensor->numel(),
-                                             begin_norm_axis,
-                                             eps,
-                                             mean_shape,
-                                             variance_shape);
+          new plugin::LayerNormPluginDynamic(
+              static_cast<const float*>(bias_weight.get().values),
+              bias_weight.get().count,
+              static_cast<const float*>(scale_weight.get().values),
+              scale_weight.get().count,
+              begin_norm_axis,
+              eps,
+              mean_shape,
+              variance_shape);
       layernorm_layer = engine_->AddDynamicPlugin(&X, 1, plugin);
     } else {
       int input_num = 1;
@@ -89,23 +80,20 @@ class LayerNormOpConverter : public OpConverter {
       }
       std::vector<int64_t> mean_shape{input_num};
       std::vector<int64_t> variance_shape{input_num};
-      plugin::LayerNormPlugin* plugin =
-          new plugin::LayerNormPlugin(bias_data,
-                                      bias_tensor->numel(),
-                                      scale_data,
-                                      scale_tensor->numel(),
-                                      begin_norm_axis,
-                                      eps,
-                                      mean_shape,
-                                      variance_shape);
+      plugin::LayerNormPlugin* plugin = new plugin::LayerNormPlugin(
+          static_cast<const float*>(bias_weight.get().values),
+          bias_weight.get().count,
+          static_cast<const float*>(scale_weight.get().values),
+          scale_weight.get().count,
+          begin_norm_axis,
+          eps,
+          mean_shape,
+          variance_shape);
       layernorm_layer = engine_->AddPlugin(
           &X, 1, reinterpret_cast<plugin::PluginTensorRT*>(plugin));
     }
 
     auto output_name = op_desc.Output("Y").front();
-    engine_->SetWeights(op_desc.Input("Bias").front(), std::move(bias_tensor));
-    engine_->SetWeights(op_desc.Input("Scale").front(),
-                        std::move(scale_tensor));
     RreplenishLayerAndOutput(
         layernorm_layer, "layer_norm", {output_name}, test_mode);
   }
diff --git a/paddle/fluid/inference/tensorrt/convert/multihead_matmul_op.cc b/paddle/fluid/inference/tensorrt/convert/multihead_matmul_op.cc
index d30dc5eb35b15c2c842e6ab54b007a6810ac0071..8bc44cc6ab9d2abec864c36c28245885a9462fc2 100644
--- a/paddle/fluid/inference/tensorrt/convert/multihead_matmul_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/multihead_matmul_op.cc
@@ -48,9 +48,11 @@ class MultiheadMatMulOpConverter : public OpConverter {
       in_scale = BOOST_GET_CONST(float, op_desc.GetAttr("Input_scale"));
       engine_->SetTensorDynamicRange(input, in_scale);
     }
-    weight_data = engine_->GetWeightCPUData(weight_name, weight_t);
+    weight_data = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(weight_name, *weight_t).get().values));
 
-    float* bias_data = engine_->GetWeightCPUData(bias_name, bias_t);
+    float* bias_data = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(bias_name, *bias_t).get().values));
     std::vector<float> weight_data_tmp;
     weight_data_tmp.reserve(weight_t->numel());
     memcpy(
diff --git a/paddle/fluid/inference/tensorrt/convert/op_converter.h b/paddle/fluid/inference/tensorrt/convert/op_converter.h
index 8bcc926b856e2d5ead66bd2d24603b5f379a6dfd..0eb2bc0875fdfb3f6950a7f91cba55508f14963d 100644
--- a/paddle/fluid/inference/tensorrt/convert/op_converter.h
+++ b/paddle/fluid/inference/tensorrt/convert/op_converter.h
@@ -343,6 +343,8 @@ class OpConverter {
             FluidDataType2TRT(
                 var->Proto()->type().lod_tensor().tensor().data_type()),
             Vec2TRT_Dims(var_shape, input));
+        VLOG(1) << "Set trt input [" << input << "] type is "
+                << var->Proto()->type().lod_tensor().tensor().data_type();
       }
     }
     PADDLE_ENFORCE_EQ(all_dynamic_shape_set,
@@ -561,33 +563,8 @@ class OpConverter {
                                            const std::string& name) {
     auto* var_v = scope.FindVar(name);
     auto* var_t = var_v->GetMutable<framework::LoDTensor>();
-    void* trt_ptr = nullptr;
-    size_t trt_num = static_cast<size_t>(var_t->numel());
-    nvinfer1::DataType trt_dtype = nvinfer1::DataType::kFLOAT;
-    if (var_t->dtype() == phi::DataType::FLOAT32) {
-      float* data_ptr = engine_->GetWeightCPUData(name, var_t);
-      trt_ptr = static_cast<void*>(data_ptr);
-    } else if (var_t->dtype() == phi::DataType::INT32) {
-      int32_t* data_ptr = engine_->GetWeightCPUData<int32_t>(name, var_t);
-      trt_ptr = static_cast<void*>(data_ptr);
-      trt_dtype = nvinfer1::DataType::kINT32;
-    } else if (var_t->dtype() == phi::DataType::INT64) {
-      int64_t* data_ptr = engine_->GetWeightCPUData<int64_t>(name, var_t);
-      // We must create a new framework::Tensor()
-      std::unique_ptr<framework::Tensor> new_var_t(new framework::Tensor());
-      new_var_t->Resize({var_t->numel()});
-      int32_t* new_data_ptr =
-          new_var_t->mutable_data<int32_t>(platform::CPUPlace());
-      for (size_t i = 0; i < trt_num; i++) {
-        new_data_ptr[i] = data_ptr[i];
-      }
-      engine_->SetWeights(name, std::move(new_var_t));
-      trt_ptr = static_cast<void*>(new_data_ptr);
-      trt_dtype = nvinfer1::DataType::kINT32;
-    } else {
-      PADDLE_THROW(platform::errors::InvalidArgument(
-          "Unsupported datatype in TensorRT"));
-    }
+    auto weight = engine_->GetTrtWeight(name, *var_t);
+
     // Now we have create weights, then we need create a itensor
     auto var_dims = var_t->dims();
     nvinfer1::Dims trt_in_shape;
@@ -603,7 +580,6 @@ class OpConverter {
         trt_in_shape.d[i] = trt_in_shape.d[i + 1];
       }
     }
-    TensorRTEngine::Weight weight{trt_dtype, trt_ptr, trt_num};
     nvinfer1::ILayer* layer =
         TRT_ENGINE_ADD_LAYER(engine_, Constant, trt_in_shape, weight.get());
     engine_->SetITensor(name, layer->getOutput(0));
diff --git a/paddle/fluid/inference/tensorrt/convert/preln_emb_eltwise_layernorm.cc b/paddle/fluid/inference/tensorrt/convert/preln_emb_eltwise_layernorm.cc
index 78dd812e035dbf6a9a26e884bcb412ca7f81005f..5bfa1170fa1091138f2cd6c4264879edf92740da 100644
--- a/paddle/fluid/inference/tensorrt/convert/preln_emb_eltwise_layernorm.cc
+++ b/paddle/fluid/inference/tensorrt/convert/preln_emb_eltwise_layernorm.cc
@@ -81,7 +81,8 @@ class PrelnEmbEltwiseLayerNormOpConverter : public OpConverter {
       auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
       (*dims) = temp_tensor->dims();
 
-      auto* temp_data = engine_->GetWeightCPUData(var_name, temp_tensor);
+      auto* temp_data = const_cast<float*>(static_cast<const float*>(
+          engine_->GetFp32TrtWeight(var_name, *temp_tensor).get().values));
       return temp_data;
     };
 
diff --git a/paddle/fluid/inference/tensorrt/convert/preln_residual_bias.cc b/paddle/fluid/inference/tensorrt/convert/preln_residual_bias.cc
index d09df4a4f281894345bb9e6e0ae621e8e2468801..7b89b62dc8b66c465d6d2481f30b89fceb70967b 100644
--- a/paddle/fluid/inference/tensorrt/convert/preln_residual_bias.cc
+++ b/paddle/fluid/inference/tensorrt/convert/preln_residual_bias.cc
@@ -13,6 +13,7 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/engine.h"
 #include "paddle/fluid/inference/tensorrt/plugin/preln_residual_bias_plugin.h"
 
 namespace paddle {
@@ -43,7 +44,8 @@ class PrelnResidualBiasOpConverter : public OpConverter {
       auto* temp_var = scope.FindVar(var_name);
       auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
       (*dims) = temp_tensor->dims();
-      auto* temp_data = engine_->GetWeightCPUData(var_name, temp_tensor);
+      auto* temp_data = const_cast<float*>(static_cast<const float*>(
+          engine_->GetFp32TrtWeight(var_name, *temp_tensor).get().values));
       return temp_data;
     };
     framework::DDim bias_dims, scale_dims, ele_bias_dims;
diff --git a/paddle/fluid/inference/tensorrt/convert/preln_skip_layernorm.cc b/paddle/fluid/inference/tensorrt/convert/preln_skip_layernorm.cc
index 7824a9b23dc5ec88258ff0df3c478e3e638eab95..bc9b317920755a8c680b031863ecd01ce2c899c8 100644
--- a/paddle/fluid/inference/tensorrt/convert/preln_skip_layernorm.cc
+++ b/paddle/fluid/inference/tensorrt/convert/preln_skip_layernorm.cc
@@ -49,7 +49,8 @@ class PrelnSkipLayerNormOpConverter : public OpConverter {
       auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
       (*dims) = temp_tensor->dims();
 
-      auto* temp_data = engine_->GetWeightCPUData(var_name, temp_tensor);
+      auto* temp_data = const_cast<float*>(static_cast<const float*>(
+          engine_->GetFp32TrtWeight(var_name, *temp_tensor).get().values));
       return temp_data;
     };
 
diff --git a/paddle/fluid/inference/tensorrt/convert/prelu_op.cc b/paddle/fluid/inference/tensorrt/convert/prelu_op.cc
index 3195833c0e5701169f0a25558fa193cdf1a7a9ba..38b01eff6fb1989a49c015d0a4b9eb372b0d175c 100644
--- a/paddle/fluid/inference/tensorrt/convert/prelu_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/prelu_op.cc
@@ -43,28 +43,21 @@ class PReluOpConverter : public OpConverter {
     auto* alpha_var = scope.FindVar(op_desc.Input("Alpha")[0]);
     auto* alpha_tensor = alpha_var->GetMutable<framework::LoDTensor>();
 
+    auto alpha_weight =
+        engine_->GetFp32TrtWeight(op_desc.Input("Alpha")[0], *alpha_tensor);
+
     platform::CPUPlace cpu_place;
-    std::unique_ptr<framework::LoDTensor> alpha_tensor_temp(
-        new framework::LoDTensor());
-    alpha_tensor_temp->Resize(alpha_tensor->dims());
-    paddle::framework::TensorCopySync(
-        *alpha_tensor, cpu_place, alpha_tensor_temp.get());
-    float* alpha_data = alpha_tensor_temp->mutable_data<float>(cpu_place);
 
     nvinfer1::ILayer* layer = nullptr;
     if (engine_->with_dynamic_shape()) {
       plugin::PReluPluginDynamic* plugin = new plugin::PReluPluginDynamic(
-          alpha_data, alpha_tensor_temp->numel(), mode, data_format);
+          static_cast<const float*>(alpha_weight.get().values),
+          alpha_tensor->numel(),
+          mode,
+          data_format);
       layer = engine_->AddDynamicPlugin(&input, input_num, plugin);
     } else {
 #if IS_TRT_VERSION_GE(7000)
-      float* alpha_weight_data =
-          engine_->GetWeightCPUData(op_desc.Input("Alpha")[0], alpha_tensor);
-      TensorRTEngine::Weight alpha_weight{
-          nvinfer1::DataType::kFLOAT,
-          static_cast<void*>(alpha_weight_data),
-          static_cast<size_t>(alpha_tensor->numel())};
-
       nvinfer1::Dims dims;
       dims.nbDims = 0;
       // jump batch dim
@@ -83,13 +76,13 @@ class PReluOpConverter : public OpConverter {
           engine_, ParametricReLU, *input, *alpha_layer_output);
 #else
       plugin::PReluPlugin* plugin = new plugin::PReluPlugin(
-          alpha_data, alpha_tensor_temp->numel(), mode, data_format);
+          static_cast<const float*>(alpha_weight.get().values),
+          alpha_tensor->numel(),
+          mode,
+          data_format);
       layer = engine_->AddPlugin(&input, input_num, plugin);
 #endif
     }
-    // keep alpha tensor to avoid release it's memory
-    engine_->SetWeights(op_desc.Input("Alpha")[0],
-                        std::move(alpha_tensor_temp));
 
     auto output_name = op_desc.Output("Out")[0];
     RreplenishLayerAndOutput(layer, "prelu", {output_name}, test_mode);
diff --git a/paddle/fluid/inference/tensorrt/convert/skip_layernorm.cc b/paddle/fluid/inference/tensorrt/convert/skip_layernorm.cc
index 9ed72610dc1794ce1439777c692f9d5c64b343ec..cf95a4d9b55e0e8cea99491fa28fa7839b00ec72 100644
--- a/paddle/fluid/inference/tensorrt/convert/skip_layernorm.cc
+++ b/paddle/fluid/inference/tensorrt/convert/skip_layernorm.cc
@@ -13,6 +13,8 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/convert/utils.h"
+#include "paddle/fluid/inference/tensorrt/engine.h"
 #include "paddle/fluid/inference/tensorrt/plugin/skip_layernorm_op_plugin.h"
 
 namespace paddle {
@@ -34,22 +36,6 @@ class SkipLayerNormOpConverter : public OpConverter {
     inputs.push_back(input1);
     inputs.push_back(input2);
 
-    auto get_persistable_data = [&](const std::string& arg_name,
-                                    framework::DDim* dims) -> float* {
-      std::string var_name = op_desc.Input(arg_name).front();
-      auto* temp_var = scope.FindVar(var_name);
-      auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
-      (*dims) = temp_tensor->dims();
-
-      auto* temp_data = engine_->GetWeightCPUData(var_name, temp_tensor);
-      return temp_data;
-    };
-
-    framework::DDim bias_dims, scale_dims;
-    auto* bias = get_persistable_data("Bias", &bias_dims);
-    auto* scale = get_persistable_data("Scale", &scale_dims);
-    int bias_size = phi::product(bias_dims);
-    int scale_size = phi::product(scale_dims);
     bool enable_int8 = op_desc.HasAttr("enable_int8");
 
     nvinfer1::ILayer* layer = nullptr;
@@ -57,6 +43,18 @@ class SkipLayerNormOpConverter : public OpConverter {
                           engine_->tensorrt_transformer_posid() != "" &&
                           engine_->tensorrt_transformer_maskid() != "";
     if (flag_varseqlen) {
+      auto GetWeight =
+          [&](const std::string& arg_name) -> TensorRTEngine::Weight {
+        std::string var_name = op_desc.Input(arg_name).front();
+        auto* temp_var = scope.FindVar(var_name);
+        auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
+        auto weight = engine_->GetTrtWeight(var_name, *temp_tensor);
+        return weight;
+      };
+
+      auto bias_weight = GetWeight("Bias").get();
+      auto scale_weight = GetWeight("Scale").get();
+
       if (engine_->with_interleaved()) {
         VLOG(4)
             << "fused skip_layernorm op: use_varseqlen and with_interleaved";
@@ -72,11 +70,14 @@ class SkipLayerNormOpConverter : public OpConverter {
             platform::errors::InvalidArgument(
                 "fail to get creator of CustomSkipLayerNormPluginDynamic"));
         const std::vector<nvinfer1::PluginField> fields{
-            {"beta", bias, nvinfer1::PluginFieldType::kFLOAT32, bias_size},
+            {"beta",
+             bias_weight.values,
+             GetPluginFieldType(bias_weight.type),
+             static_cast<int32_t>(bias_weight.count)},
             { "gamma",
-              scale,
-              nvinfer1::PluginFieldType::kFLOAT32,
-              scale_size }};
+              scale_weight.values,
+              GetPluginFieldType(scale_weight.type),
+              static_cast<int32_t>(scale_weight.count) }};
         nvinfer1::PluginFieldCollection* pluginPtr =
             static_cast<nvinfer1::PluginFieldCollection*>(
                 malloc(sizeof(*pluginPtr) +
@@ -119,8 +120,14 @@ class SkipLayerNormOpConverter : public OpConverter {
         const std::vector<nvinfer1::PluginField> fields{
             {"type_id", &type, nvinfer1::PluginFieldType::kINT32, 1},
             {"ld", &ld, nvinfer1::PluginFieldType::kINT32, 1},
-            {"beta", bias, nvinfer1::PluginFieldType::kFLOAT32, bias_size},
-            {"gamma", scale, nvinfer1::PluginFieldType::kFLOAT32, scale_size},
+            {"beta",
+             bias_weight.values,
+             GetPluginFieldType(bias_weight.type),
+             static_cast<int32_t>(bias_weight.count)},
+            {"gamma",
+             scale_weight.values,
+             GetPluginFieldType(scale_weight.type),
+             static_cast<int32_t>(scale_weight.count)},
         };
         nvinfer1::PluginFieldCollection* pluginPtr =
             static_cast<nvinfer1::PluginFieldCollection*>(
@@ -143,12 +150,29 @@ class SkipLayerNormOpConverter : public OpConverter {
         layer = plugin_layer;
       }
     } else {
+      auto GetFp32Weight =
+          [&](const std::string& arg_name) -> TensorRTEngine::Weight {
+        std::string var_name = op_desc.Input(arg_name).front();
+        auto* temp_var = scope.FindVar(var_name);
+        auto* temp_tensor = temp_var->GetMutable<framework::LoDTensor>();
+        auto weight = engine_->GetFp32TrtWeight(var_name, *temp_tensor);
+        return weight;
+      };
+
+      auto bias_weight = GetFp32Weight("Bias").get();
+      auto scale_weight = GetFp32Weight("Scale").get();
+
       float eps = BOOST_GET_CONST(float, op_desc.GetAttr("epsilon"));
       bool with_fp16 =
           engine_->WithFp16() && !engine_->disable_trt_plugin_fp16();
       plugin::SkipLayerNormPluginDynamic* plugin =
           new plugin::SkipLayerNormPluginDynamic(
-              bias, scale, bias_size, scale_size, eps, with_fp16);
+              static_cast<const float*>(bias_weight.values),
+              static_cast<const float*>(scale_weight.values),
+              bias_weight.count,
+              scale_weight.count,
+              eps,
+              with_fp16);
       layer = engine_->AddDynamicPlugin(inputs.data(), 2, plugin);
     }
 
diff --git a/paddle/fluid/inference/tensorrt/convert/sparse_fc_op.cc b/paddle/fluid/inference/tensorrt/convert/sparse_fc_op.cc
index 6974e5a77006e28184f4929323eefc78128db639..33801e969172a28f8861d66b115a4d43ee6cdb44 100644
--- a/paddle/fluid/inference/tensorrt/convert/sparse_fc_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/sparse_fc_op.cc
@@ -154,7 +154,10 @@ class SparseFcOpConverter : public OpConverter {
       }
       engine_->SetTensorDynamicRange(X, in_scale);
     }
-    weight_data = engine_->GetWeightCPUData(op_desc.Input(w_name).front(), Y_t);
+    weight_data = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(op_desc.Input(w_name).front(), *Y_t)
+            .get()
+            .values));
 
     PADDLE_ENFORCE_EQ(
         Y_t->dims().size(),
@@ -321,7 +324,10 @@ class SparseFcOpConverter : public OpConverter {
     if (with_bias) {
       auto* b_v = scope.GetVar(op_desc.Input("Bias").front());
       auto* b_t = b_v->GetMutable<framework::LoDTensor>();
-      bias_data = engine_->GetWeightCPUData(op_desc.Input("Bias").front(), b_t);
+      bias_data = weight_data = const_cast<float*>(static_cast<const float*>(
+          engine_->GetFp32TrtWeight(op_desc.Input("Bias").front(), *b_t)
+              .get()
+              .values));
       bias_num = b_t->numel();
     }
     // Running the TRT Static Shape mode: x_num_col_dims-1
diff --git a/paddle/fluid/inference/tensorrt/convert/sparse_multihead_matmul_op.cc b/paddle/fluid/inference/tensorrt/convert/sparse_multihead_matmul_op.cc
index 7f54f97d34933c47f5d34d6e7fb1a45a970fb611..4a8d15ef0dbace05f59eb89dfaf79392e99a5b33 100644
--- a/paddle/fluid/inference/tensorrt/convert/sparse_multihead_matmul_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/sparse_multihead_matmul_op.cc
@@ -64,9 +64,11 @@ class SparseMultiheadMatMulOpConverter : public OpConverter {
       in_scale = BOOST_GET_CONST(float, op_desc.GetAttr("Input_scale"));
       engine_->SetTensorDynamicRange(input, in_scale);
     }
-    weight_data = engine_->GetWeightCPUData(weight_name, weight_t);
+    weight_data = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(weight_name, *weight_t).get().values));
 
-    float* bias_data = engine_->GetWeightCPUData(bias_name, bias_t);
+    float* bias_data = const_cast<float*>(static_cast<const float*>(
+        engine_->GetFp32TrtWeight(bias_name, *bias_t).get().values));
     std::vector<float> weight_data_tmp;
     weight_data_tmp.reserve(weight_t->numel());
     memcpy(
diff --git a/paddle/fluid/inference/tensorrt/convert/utils.h b/paddle/fluid/inference/tensorrt/convert/utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..1415e67fbeccdfd085489b8f5a7aa0710d1bd40d
--- /dev/null
+++ b/paddle/fluid/inference/tensorrt/convert/utils.h
@@ -0,0 +1,45 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <string>
+#include "paddle/fluid/inference/tensorrt/engine.h"
+
+namespace paddle {
+namespace inference {
+namespace tensorrt {
+
+inline nvinfer1::PluginFieldType GetPluginFieldType(nvinfer1::DataType type) {
+  switch (type) {
+#if IS_TRT_VERSION_GE(7000)
+    case nvinfer1::DataType::kBOOL:
+      return nvinfer1::PluginFieldType::kCHAR;
+#endif
+    case nvinfer1::DataType::kFLOAT:
+      return nvinfer1::PluginFieldType::kFLOAT32;
+    case nvinfer1::DataType::kHALF:
+      return nvinfer1::PluginFieldType::kFLOAT16;
+    case nvinfer1::DataType::kINT32:
+      return nvinfer1::PluginFieldType::kINT32;
+    case nvinfer1::DataType::kINT8:
+      return nvinfer1::PluginFieldType::kINT8;
+    default:
+      return nvinfer1::PluginFieldType::kUNKNOWN;
+  }
+}
+
+}  // namespace tensorrt
+}  // namespace inference
+}  // namespace paddle
diff --git a/paddle/fluid/inference/tensorrt/engine.cc b/paddle/fluid/inference/tensorrt/engine.cc
index 9fe8f67e6a6573a31883b7816d4beec79b621057..a4d373e83b35523305177adb29f1cda04b3fd0b9 100644
--- a/paddle/fluid/inference/tensorrt/engine.cc
+++ b/paddle/fluid/inference/tensorrt/engine.cc
@@ -19,15 +19,46 @@ limitations under the License. */
 
 #include <string>
 
+#include "NvInferRuntimeCommon.h"
 #include "cuda_runtime_api.h"  // NOLINT
 #include "paddle/fluid/inference/tensorrt/helper.h"
 #include "paddle/fluid/platform/device/gpu/gpu_info.h"
 #include "paddle/fluid/platform/enforce.h"
+#include "paddle/phi/common/data_type.h"
 
 namespace paddle {
 namespace inference {
 namespace tensorrt {
 
+void TensorRTEngine::Weight::SetDataType(phi::DataType type) {
+  nvinfer1::DataType nv_type;
+  switch (type) {
+    case phi::DataType::FLOAT32:
+      nv_type = nvinfer1::DataType::kFLOAT;
+      break;
+    case phi::DataType::FLOAT16:
+      nv_type = nvinfer1::DataType::kHALF;
+      break;
+    case phi::DataType::INT32:
+      nv_type = nvinfer1::DataType::kINT32;
+      break;
+    case phi::DataType::INT8:
+      nv_type = nvinfer1::DataType::kINT8;
+      break;
+#if IS_TRT_VERSION_GE(7000)
+    case phi::DataType::BOOL:
+      nv_type = nvinfer1::DataType::kBOOL;
+      break;
+#endif
+    default:
+      paddle::platform::errors::InvalidArgument(
+          "Paddle-TRT loads weighths failed, found not supported data type %s.",
+          type);
+      break;
+  }
+  w_.type = nv_type;
+}
+
 int TensorRTEngine::runtime_batch_ = 1;
 
 void TensorRTEngine::InitNetwork() {
@@ -197,6 +228,18 @@ void TensorRTEngine::FreezeNetwork() {
     }
   }
 
+  // If model is mixed precision, then we should cast all float output to
+  // float32 precision. Otherwise, we can not confirm the output precision of
+  // the trt engine.
+  if (model_precision_ != phi::DataType::FLOAT32) {
+    for (int i = 0; i < network()->getNbOutputs(); ++i) {
+      network()->getOutput(i)->setAllowedFormats(
+          static_cast<nvinfer1::TensorFormats>(
+              1 << static_cast<int>(nvinfer1::TensorFormat::kLINEAR)));
+      network()->getOutput(i)->setType(nvinfer1::DataType::kFLOAT);
+    }
+  }
+
   if (use_dla_) {
     if (!enable_int8 && !enable_fp16) {
       LOG(WARNING) << "TensorRT DLA must be used with int8 or fp16, but you "
@@ -399,26 +442,126 @@ void TensorRTEngine::SetRuntimeBatch(size_t batch_size) {
   runtime_batch_ = batch_size;
 }
 
-template <typename T = float>
-T *TensorRTEngine::GetWeightCPUData(const std::string &name,
-                                    framework::Tensor *weight_tensor) {
-  std::unique_ptr<framework::Tensor> cpu_weight_tensor(new framework::Tensor());
+TensorRTEngine::Weight TensorRTEngine::GetFp32TrtWeight(
+    const std::string &name, const framework::Tensor &weight_tensor) {
+  static int name_suffix_counter = 0;
+  std::string name_suffix = std::to_string(name_suffix_counter);
+  std::string splitter = "__";
+  std::string name_with_suffix = name + splitter + name_suffix;
   platform::CPUPlace cpu_place;
-  cpu_weight_tensor->Resize(weight_tensor->dims());
-  paddle::framework::TensorCopySync(
-      *weight_tensor, cpu_place, cpu_weight_tensor.get());
-  T *weight_data = cpu_weight_tensor->mutable_data<T>(cpu_place);
-  SetWeights(name, std::move(cpu_weight_tensor));
-  return weight_data;
+  PADDLE_ENFORCE_EQ(weight_map.count(name_with_suffix),
+                    0,
+                    platform::errors::AlreadyExists(
+                        "The weight named %s is set into the weight map "
+                        "twice in TRT OP converter.",
+                        name_with_suffix));
+  weight_map[name_with_suffix].reset(new framework::Tensor());
+  weight_map[name_with_suffix]->Resize(weight_tensor.dims());
+
+  TensorRTEngine::Weight weight;
+  weight.SetCount(weight_tensor.numel());
+  weight.SetDataType(nvinfer1::DataType::kFLOAT);
+  // weight_tensor.dims().;
+
+  // if trt not support dtype, we need to cast to  fp32.
+  if (weight_tensor.dtype() == phi::DataType::BFLOAT16) {
+    framework::Tensor bf16_tensor;
+    bf16_tensor.clear();
+    paddle::framework::TensorCopySync(
+        weight_tensor, platform::CPUPlace(), &bf16_tensor);
+    weight_map[name_with_suffix]->set_type(
+        paddle::experimental::DataType::FLOAT32);
+    weight_map[name_with_suffix]->Resize(weight_tensor.dims());
+    auto *fp32_data =
+        weight_map[name_with_suffix]->mutable_data<float>(platform::CPUPlace());
+    auto *bf16_data = bf16_tensor.mutable_data<bfloat16>(platform::CPUPlace());
+    for (int i = 0; i < weight_tensor.numel(); i++) {
+      fp32_data[i] = static_cast<float>(bf16_data[i]);
+    }
+  } else if (weight_tensor.dtype() == phi::DataType::FLOAT16) {
+    framework::Tensor fp16_tensor;
+    fp16_tensor.clear();
+    paddle::framework::TensorCopySync(
+        weight_tensor, platform::CPUPlace(), &fp16_tensor);
+    weight_map[name_with_suffix]->set_type(
+        paddle::experimental::DataType::FLOAT32);
+    weight_map[name_with_suffix]->Resize(weight_tensor.dims());
+    auto *fp32_data =
+        weight_map[name_with_suffix]->mutable_data<float>(platform::CPUPlace());
+    auto *fp16_data = fp16_tensor.mutable_data<float16>(platform::CPUPlace());
+    for (int i = 0; i < weight_tensor.numel(); i++) {
+      fp32_data[i] = static_cast<float>(fp16_data[i]);
+    }
+  } else {
+    paddle::framework::TensorCopySync(
+        weight_tensor, cpu_place, weight_map[name_with_suffix].get());
+  }
+  weight.SetValues(weight_map[name_with_suffix]->data());
+  name_suffix_counter += 1;
+  return weight;
 }
 
-template float *TensorRTEngine::GetWeightCPUData(
-    const std::string &name, framework::Tensor *weight_tensor);
-template int32_t *TensorRTEngine::GetWeightCPUData(
-    const std::string &name, framework::Tensor *weight_tensor);
+TensorRTEngine::Weight TensorRTEngine::GetTrtWeight(
+    const std::string &name, const framework::Tensor &weight_tensor) {
+  static int name_suffix_counter = 0;
+  std::string name_suffix = std::to_string(name_suffix_counter);
+  std::string splitter = "__";
+  std::string name_with_suffix = name + splitter + name_suffix;
+  platform::CPUPlace cpu_place;
+  PADDLE_ENFORCE_EQ(weight_map.count(name_with_suffix),
+                    0,
+                    platform::errors::AlreadyExists(
+                        "The weight named %s is set into the weight map "
+                        "twice in TRT OP converter.",
+                        name_with_suffix));
+
+  weight_map[name_with_suffix].reset(new framework::Tensor());
+  weight_map[name_with_suffix]->Resize(weight_tensor.dims());
+
+  TensorRTEngine::Weight weight;
+  weight.SetCount(weight_tensor.numel());
+
+  // if trt not support dtype, we need to cast to fp32.
+  if (weight_tensor.dtype() == phi::DataType::BFLOAT16) {
+    framework::Tensor bf16_tensor;
+    bf16_tensor.clear();
+    paddle::framework::TensorCopySync(
+        weight_tensor, platform::CPUPlace(), &bf16_tensor);
+    weight_map[name_with_suffix]->set_type(
+        paddle::experimental::DataType::FLOAT32);
+    auto *fp32_data =
+        weight_map[name_with_suffix]->mutable_data<float>(platform::CPUPlace());
+    auto *bf16_data = bf16_tensor.mutable_data<bfloat16>(platform::CPUPlace());
+    for (int i = 0; i < weight_tensor.numel(); i++) {
+      fp32_data[i] = static_cast<float>(bf16_data[i]);
+    }
+    weight.SetDataType(phi::DataType::FLOAT32);
+    weight.SetValues(fp32_data);
+  } else if (weight_tensor.dtype() == phi::DataType::INT64) {
+    framework::Tensor int64_tensor;
+    int64_tensor.clear();
+    paddle::framework::TensorCopySync(
+        weight_tensor, platform::CPUPlace(), &int64_tensor);
+    weight_map[name_with_suffix]->set_type(
+        paddle::experimental::DataType::INT32);
+    auto *int32_data =
+        weight_map[name_with_suffix]->mutable_data<int>(platform::CPUPlace());
+    auto *int64_data = int64_tensor.mutable_data<int64_t>(platform::CPUPlace());
+    for (int i = 0; i < weight_tensor.numel(); i++) {
+      int32_data[i] = int64_data[i];
+    }
+    weight.SetDataType(phi::DataType::FLOAT32);
+    weight.SetValues(int32_data);
+  } else {
+    paddle::framework::TensorCopySync(
+        weight_tensor, cpu_place, weight_map[name_with_suffix].get());
+    weight.SetDataType(weight_tensor.dtype());
+    weight.SetValues(weight_map[name_with_suffix]->data());
+  }
 
-template int64_t *TensorRTEngine::GetWeightCPUData(
-    const std::string &name, framework::Tensor *weight_tensor);
+  name_suffix_counter += 1;
+  return weight;
+}
 
 int TensorRTEngine::GetRuntimeBatch() { return runtime_batch_; }
 
diff --git a/paddle/fluid/inference/tensorrt/engine.h b/paddle/fluid/inference/tensorrt/engine.h
index 5c2bb6e0ca07f412deea65d83fd43d0dcc341d80..73506eb8f6244d8d8a9107f3e0e8efa657982ab3 100644
--- a/paddle/fluid/inference/tensorrt/engine.h
+++ b/paddle/fluid/inference/tensorrt/engine.h
@@ -25,6 +25,8 @@ limitations under the License. */
 #include <utility>
 #include <vector>
 
+#include "NvInferRuntimeCommon.h"
+#include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/framework/tensor.h"
 #include "paddle/fluid/framework/tensor_util.h"
 #include "paddle/fluid/inference/api/paddle_analysis_config.h"
@@ -34,6 +36,7 @@ limitations under the License. */
 #include "paddle/fluid/inference/tensorrt/trt_int8_calibrator.h"
 #include "paddle/fluid/inference/utils/singleton.h"
 #include "paddle/fluid/platform/enforce.h"
+#include "paddle/phi/common/data_type.h"
 #include "paddle/utils/any.h"
 
 namespace paddle {
@@ -187,6 +190,14 @@ class TensorRTEngine {
     }
     const nvinfer1::Weights& get() { return w_; }
 
+    void SetDataType(nvinfer1::DataType type) { w_.type = type; }
+
+    void SetDataType(phi::DataType type);
+
+    void SetValues(const void* values) { w_.values = values; }
+
+    void SetCount(int64_t num) { w_.count = num; }
+
     std::vector<int64_t> dims;
 
    private:
@@ -203,6 +214,7 @@ class TensorRTEngine {
       const ShapeMapType max_input_shape = {},
       const ShapeMapType optim_input_shape = {},
       bool disable_trt_plugin_fp16 = false,
+      phi::DataType model_precision = phi::DataType::FLOAT32,
       nvinfer1::ILogger& logger = NaiveLogger::Global())
       : max_batch_(max_batch),
         max_workspace_(max_workspace),
@@ -213,6 +225,7 @@ class TensorRTEngine {
         max_input_shape_(max_input_shape),
         optim_input_shape_(optim_input_shape),
         disable_trt_plugin_fp16_(disable_trt_plugin_fp16),
+        model_precision_(model_precision),
         logger_(logger) {
     if (min_input_shape_.size() != 0 && max_input_shape_.size() != 0 &&
         optim_input_shape_.size() != 0) {
@@ -407,6 +420,14 @@ class TensorRTEngine {
     quant_dynamic_range_[tensor] = range;
   }
 
+  // Get fp32 trt weight. If src weight is not fp32, we will cast.
+  Weight GetFp32TrtWeight(const std::string& name,
+                          const framework::Tensor& weight_tensor);
+
+  // if the src weight type is fp16, then return fp16 trt weight, etc.
+  Weight GetTrtWeight(const std::string& name,
+                      const framework::Tensor& weight_tensor);
+
   float GetTensorDynamicRange(nvinfer1::ITensor* tensor) {
     return quant_dynamic_range_[tensor];
   }
@@ -415,10 +436,6 @@ class TensorRTEngine {
     return quant_dynamic_range_.count(tensor);
   }
 
-  template <typename T = float>
-  T* GetWeightCPUData(const std::string& name,
-                      framework::Tensor* weight_tensor);
-
   // A pointer to CPU memory is needed of the TRT weight.
   // Before TRT runs, fluid loads weight into GPU storage.
   // so we need to copy the weights from GPU to CPU in our op converter.
@@ -669,6 +686,7 @@ class TensorRTEngine {
   ShapeMapType max_input_shape_;
   ShapeMapType optim_input_shape_;
   bool disable_trt_plugin_fp16_{false};
+  phi::DataType model_precision_{phi::DataType::FLOAT32};
   bool use_varseqlen_{false};
   bool use_dla_{false};
   int dla_core_{0};
@@ -756,6 +774,7 @@ class TRTEngineManager {
       const std::map<std::string, std::vector<int>> max_input_shape = {},
       const std::map<std::string, std::vector<int>> optim_input_shape = {},
       bool disable_trt_plugin_fp16 = false,
+      phi::DataType model_precision = phi::DataType::FLOAT32,
       nvinfer1::ILogger& logger = NaiveLogger::Global()) {
     auto* p = new TensorRTEngine(max_batch,
                                  max_workspace,
@@ -766,6 +785,7 @@ class TRTEngineManager {
                                  max_input_shape,
                                  optim_input_shape,
                                  disable_trt_plugin_fp16,
+                                 model_precision,
                                  logger);
     engines_[name].reset(p);
     return p;
diff --git a/paddle/fluid/inference/tensorrt/test_dynamic_engine.cc b/paddle/fluid/inference/tensorrt/test_dynamic_engine.cc
index 8f20ffb5e6b8cbf4c95b226ca06bf97866cdbd5e..eae1e2baf9ad1694f0b291cb61df45dd36fb9573 100644
--- a/paddle/fluid/inference/tensorrt/test_dynamic_engine.cc
+++ b/paddle/fluid/inference/tensorrt/test_dynamic_engine.cc
@@ -18,6 +18,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/tensor.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/engine.h"
+#include "paddle/phi/common/data_type.h"
 #if PADDLE_WITH_CUSPARSELT && IS_TRT_VERSION_GE(8000)
 #include "paddle/fluid/inference/tensorrt/plugin/spmm_plugin.h"
 #endif
@@ -66,6 +67,7 @@ class TensorRTDynamicEngineTest : public ::testing::Test {
                                  max_input_shape,
                                  optim_input_shape,
                                  false,
+                                 phi::DataType::FLOAT32,
                                  NaiveLogger::Global());
     engine_->InitNetwork();
   }
diff --git a/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h b/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h
index b0ac285b5d38d63a1205e589b6593298777b30a3..1cd2683796acd2781a714418d63001846cf18715 100644
--- a/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h
+++ b/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h
@@ -14,7 +14,12 @@
 
 #pragma once
 
+#include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/framework/scope.h"
+#include "paddle/fluid/memory/memcpy.h"
+#include "paddle/fluid/platform/place.h"
+#include "paddle/phi/common/data_type.h"
+#include "paddle/phi/common/place.h"
 #ifdef PADDLE_WITH_CUDA
 
 #include <memory>
@@ -192,6 +197,7 @@ class TensorRTEngineOp : public framework::OperatorBase {
   std::map<std::string, std::vector<int>> min_input_shape_{};
   std::map<std::string, std::vector<int>> max_input_shape_{};
   std::map<std::string, std::vector<int>> opt_input_shape_{};
+  phi::DataType model_precision_{phi::DataType::FLOAT32};
 
  public:
   TensorRTEngineOp(const std::string &type,
@@ -217,6 +223,7 @@ class TensorRTEngineOp : public framework::OperatorBase {
     if (use_static_engine_) {
       model_opt_cache_dir_ = Attr<std::string>("model_opt_cache_dir");
     }
+    model_precision_ = static_cast<phi::DataType>(Attr<int>("model_precision"));
 
     if (HasAttr("dynamic_shape_names") && HasAttr("min_input_shape") &&
         HasAttr("max_input_shape") && HasAttr("opt_input_shape")) {
@@ -555,6 +562,7 @@ class TensorRTEngineOp : public framework::OperatorBase {
 #endif
       }
       runtime_batch = t_shape[0];
+      VLOG(1) << "trt input [" << x << "] dtype is " << t.dtype();
       auto type = framework::TransToProtoVarType(t.dtype());
       if (type == framework::proto::VarType::FP32) {
         buffers[bind_index] = static_cast<void *>(t.data<float>());
@@ -619,6 +627,8 @@ class TensorRTEngineOp : public framework::OperatorBase {
                             num_bindings));
       auto trt_type = engine->engine()->getBindingDataType(bind_index);
       // get adr and set type
+      VLOG(1) << "trt output [" << y << "] dtype is "
+              << TRT2FluidDataType(trt_type);
       buffers[bind_index] = static_cast<void *>(
           fluid_t->mutable_data(dev_place, TRT2FluidDataType(trt_type)));
       output_index += 1;
diff --git a/paddle/fluid/operators/tensorrt/tensorrt_engine_op_test.cc b/paddle/fluid/operators/tensorrt/tensorrt_engine_op_test.cc
index cbe14195d41060c03641cc5133fa1038faabfbdd..8e2b162babce9c2e3de9167b923ab226623579cd 100644
--- a/paddle/fluid/operators/tensorrt/tensorrt_engine_op_test.cc
+++ b/paddle/fluid/operators/tensorrt/tensorrt_engine_op_test.cc
@@ -25,6 +25,7 @@ limitations under the License. */
 #include "paddle/fluid/inference/analysis/helper.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/convert/ut_helper.h"
+#include "paddle/phi/common/data_type.h"
 
 USE_NO_KERNEL_OP(tensorrt_engine);
 namespace paddle {
@@ -132,6 +133,8 @@ void DynamicShapeTest(bool allow_build_at_runtime) {
   engine_op_desc.SetAttr("min_input_shape", std::vector<int>{1, 4, 1, 1});
   engine_op_desc.SetAttr("max_input_shape", std::vector<int>{2, 4, 1, 1});
   engine_op_desc.SetAttr("opt_input_shape", std::vector<int>{2, 4, 1, 1});
+  engine_op_desc.SetAttr("model_precision",
+                         static_cast<int>(phi::DataType::FLOAT32));
 
   LOG(INFO) << "create engine op";
   auto engine_op = framework::OpRegistry::CreateOp(engine_op_desc);