diff --git a/Dockerfile b/Dockerfile
index b4f8c9dcebb7040f12c0122a38e59d519f443a04..42a103240e882b2732f14619308cc00f010d20af 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -137,8 +137,8 @@ RUN curl -s -q https://glide.sh/get | sh
 
 RUN wget -q https://paddlepaddledeps.bj.bcebos.com/TensorRT-4.0.1.6-ubuntu14.04.x86_64-gnu.cuda.8.0.cudnn7.0.tar.gz --no-check-certificate && \
     tar -zxf TensorRT-4.0.1.6-ubuntu14.04.x86_64-gnu.cuda.8.0.cudnn7.0.tar.gz -C /usr/local && \
-    cp -rf /usr/local/TensorRT/include /usr && \
-    cp -rf /usr/local/TensorRT/lib /usr
+    cp -rf /usr/local/TensorRT/include/* /usr/include/ && \
+    cp -rf /usr/local/TensorRT/lib/* /usr/lib/
 
 # git credential to skip password typing
 RUN git config --global credential.helper store
diff --git a/paddle/fluid/inference/analysis/argument.h b/paddle/fluid/inference/analysis/argument.h
index 1cf72f7001b2a56eb613340f8d3d71c1bbec03a6..7b8b8655e7775a49e7568260646d3f820cdc40da 100644
--- a/paddle/fluid/inference/analysis/argument.h
+++ b/paddle/fluid/inference/analysis/argument.h
@@ -59,6 +59,7 @@ struct Argument {
 
   using unique_ptr_t = std::unique_ptr<void, std::function<void(void*)>>;
   using fusion_statis_t = std::unordered_map<std::string, int>;
+  using input_shape_t = std::map<std::string, std::vector<int>>;
 
   bool Has(const std::string& key) const { return valid_fields_.count(key); }
   // If we set the model using config.SetModelBuffer,
@@ -174,6 +175,12 @@ struct Argument {
   DECL_ARGUMENT_FIELD(use_gpu, UseGPU, bool);
   DECL_ARGUMENT_FIELD(use_fc_padding, UseFcPadding, bool);
   DECL_ARGUMENT_FIELD(gpu_device_id, GPUDeviceId, int);
+
+  // usually use for trt dynamic shape.
+  DECL_ARGUMENT_FIELD(min_input_shape, MinInputShape, input_shape_t);
+  DECL_ARGUMENT_FIELD(max_input_shape, MaxInputShape, input_shape_t);
+  DECL_ARGUMENT_FIELD(optim_input_shape, OptimInputShape, input_shape_t);
+
   DECL_ARGUMENT_FIELD(use_tensorrt, UseTensorRT, bool);
   DECL_ARGUMENT_FIELD(tensorrt_max_batch_size, TensorRtMaxBatchSize, int);
   DECL_ARGUMENT_FIELD(tensorrt_workspace_size, TensorRtWorkspaceSize, int);
diff --git a/paddle/fluid/inference/analysis/ir_pass_manager.cc b/paddle/fluid/inference/analysis/ir_pass_manager.cc
index a4a2fdb2b687ff6c354a6fdae2221e5947766e6d..ad12736fac86dfcb238f0180d8a7f127f344e467 100644
--- a/paddle/fluid/inference/analysis/ir_pass_manager.cc
+++ b/paddle/fluid/inference/analysis/ir_pass_manager.cc
@@ -123,6 +123,13 @@ void IRPassManager::CreatePasses(Argument *argument,
       pass->Set("gpu_device_id", new int(argument->gpu_device_id()));
       pass->Set("use_static_engine", new bool(use_static_engine));
       pass->Set("model_from_memory", new bool(argument->model_from_memory()));
+      pass->Set("max_input_shape", new std::map<std::string, std::vector<int>>(
+                                       argument->max_input_shape()));
+      pass->Set("min_input_shape", new std::map<std::string, std::vector<int>>(
+                                       argument->min_input_shape()));
+      pass->Set("optim_input_shape",
+                new std::map<std::string, std::vector<int>>(
+                    argument->optim_input_shape()));
     }
     if (pass_name == "ngraph_subgraph_pass") {
       pass->Set("program",
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 2b6418bbf8ab43e0c9b429e2a40bb8f53157e683..66231641a6cb452a85b90c8eeb302f1c3bd033de 100644
--- a/paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc
+++ b/paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc
@@ -166,6 +166,12 @@ void TensorRtSubgraphPass::CreateTensorRTOp(
   auto enable_int8 = Get<bool>("enable_int8");
   auto use_calib_mode = Get<bool>("use_calib_mode");
   auto &subgraph_nodes = *framework::ir::Agent(node).subgraph();
+  auto min_input_shape =
+      Get<std::map<std::string, std::vector<int>>>("min_input_shape");
+  auto max_input_shape =
+      Get<std::map<std::string, std::vector<int>>>("max_input_shape");
+  auto opt_input_shape =
+      Get<std::map<std::string, std::vector<int>>>("optim_input_shape");
 
   // The following procedure is used to rename all the intermediate
   // variables and the output variables of the subgraph.
@@ -263,11 +269,33 @@ void TensorRtSubgraphPass::CreateTensorRTOp(
   std::copy(params_not_shared.begin(), params_not_shared.end(),
             std::back_inserter(*repetitive_params));
 
+  // Check trt version for dynamic shape input.
+
+  if (min_input_shape.size() > 0 && TRT_VERSION < 6000) {
+    std::cout << "hello";
+    LOG_FIRST_N(WARNING, 1) << "You are using the dynamic size input mode of "
+                               "Paddle-TRT, but we found that the version of "
+                               "the TensorRT is less than 6.0, so we use the "
+                               "static shape mode instead.";
+    min_input_shape = {};
+    max_input_shape = {};
+    opt_input_shape = {};
+  }
+
+  if (min_input_shape.size() > 0 && TRT_VERSION > 6000) {
+    LOG_FIRST_N(WARNING, 1)
+        << "The Paddle lib links the " << TRT_VERSION / 1000.
+        << " version TensorRT, "
+        << "make sure the runtime TensorRT you are using is no less than this "
+           "version, otherwise, there might be Segfault!";
+  }
+
   tensorrt::TensorRTEngine *trt_engine =
       inference::Singleton<inference::tensorrt::TRTEngineManager>::Global()
           .Create(engine_key + std::to_string(predictor_id),
                   Get<int>("max_batch_size"), Get<int>("workspace_size"),
-                  precision_mode, calibrator.get(), Get<int>("gpu_device_id"));
+                  precision_mode, calibrator.get(), Get<int>("gpu_device_id"),
+                  min_input_shape, max_input_shape, opt_input_shape);
 
   bool need_serialize = (use_static_engine && !load_from_memory);
   if (need_serialize) {
diff --git a/paddle/fluid/inference/api/analysis_config.cc b/paddle/fluid/inference/api/analysis_config.cc
index 75a05fa309fcb29cbf0d89294100366471a724c7..b6da6310b4c25ff3bc0c5551a5c5984c9ee92604 100644
--- a/paddle/fluid/inference/api/analysis_config.cc
+++ b/paddle/fluid/inference/api/analysis_config.cc
@@ -125,6 +125,9 @@ AnalysisConfig::AnalysisConfig(const AnalysisConfig &other) {
   // Quantization related.
   CP_MEMBER(use_mkldnn_quantizer_);
   CP_MEMBER(mkldnn_quantizer_config_);
+  CP_MEMBER(min_input_shape_);
+  CP_MEMBER(max_input_shape_);
+  CP_MEMBER(optim_input_shape_);
 
   CP_MEMBER(use_lite_);
   CP_MEMBER(lite_precision_mode_);
@@ -223,7 +226,10 @@ MkldnnQuantizerConfig *AnalysisConfig::mkldnn_quantizer_config() const {
 void AnalysisConfig::EnableTensorRtEngine(
     int workspace_size, int max_batch_size, int min_subgraph_size,
     AnalysisConfig::Precision precision_mode, bool use_static,
-    bool use_calib_mode) {
+    bool use_calib_mode,
+    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>> optim_input_shape) {
 #ifdef PADDLE_WITH_CUDA
   if (!use_gpu()) {
     LOG(ERROR) << "To use TensorRT engine, please call EnableGpu() first";
@@ -237,6 +243,9 @@ void AnalysisConfig::EnableTensorRtEngine(
   tensorrt_precision_mode_ = precision_mode;
   trt_use_static_engine_ = use_static;
   trt_use_calib_mode_ = use_calib_mode;
+  min_input_shape_ = min_input_shape;
+  max_input_shape_ = max_input_shape;
+  optim_input_shape_ = optim_input_shape;
 
   Update();
 #else
diff --git a/paddle/fluid/inference/api/analysis_predictor.cc b/paddle/fluid/inference/api/analysis_predictor.cc
index 5aa3d7a0527bc2736c47abf9c2bd47d52b26ce9d..78b2467ff09b137528dfb8b18d7b2b8c6657ba87 100644
--- a/paddle/fluid/inference/api/analysis_predictor.cc
+++ b/paddle/fluid/inference/api/analysis_predictor.cc
@@ -425,6 +425,9 @@ void AnalysisPredictor::PrepareArgument() {
     argument_.SetTensorRtPrecisionMode(config_.tensorrt_precision_mode_);
     argument_.SetTensorRtUseStaticEngine(config_.trt_use_static_engine_);
     argument_.SetTensorRtUseCalibMode(config_.trt_use_calib_mode_);
+    argument_.SetMinInputShape(config_.min_input_shape_);
+    argument_.SetMaxInputShape(config_.max_input_shape_);
+    argument_.SetOptimInputShape(config_.optim_input_shape_);
   }
 
   if (config_.lite_engine_enabled()) {
diff --git a/paddle/fluid/inference/api/paddle_analysis_config.h b/paddle/fluid/inference/api/paddle_analysis_config.h
index 260ec6562aa3521a751782c065c6c15ada774fa7..7a5ff0318b6676c27fda78ea3c32d0baf9f17d3b 100644
--- a/paddle/fluid/inference/api/paddle_analysis_config.h
+++ b/paddle/fluid/inference/api/paddle_analysis_config.h
@@ -160,11 +160,13 @@ struct AnalysisConfig {
    * @param min_subgrpah_size the minimum TensorRT subgraph size needed, if a
    * subgraph is less than this, it will not transfer to TensorRT engine.
    */
-  void EnableTensorRtEngine(int workspace_size = 1 << 20,
-                            int max_batch_size = 1, int min_subgraph_size = 3,
-                            Precision precision = Precision::kFloat32,
-                            bool use_static = false,
-                            bool use_calib_mode = true);
+  void EnableTensorRtEngine(
+      int workspace_size = 1 << 20, int max_batch_size = 1,
+      int min_subgraph_size = 3, Precision precision = Precision::kFloat32,
+      bool use_static = false, bool use_calib_mode = true,
+      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>> optim_input_shape = {});
   /** A boolean state telling whether the TensorRT engine is used.
    */
   bool tensorrt_engine_enabled() const { return use_tensorrt_; }
@@ -348,6 +350,9 @@ struct AnalysisConfig {
   std::string serialized_info_cache_;
 
   mutable std::unique_ptr<PassStrategy> pass_builder_;
+  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>> optim_input_shape_;
 
   bool use_lite_{false};
   std::vector<std::string> lite_passes_filter_;
diff --git a/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc b/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
index 840369976d7b731824fc390abdad915572022a51..4ae2f91d1a673d41b256113475982c1060518ad8 100644
--- a/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
@@ -49,8 +49,12 @@ class ElementwiseWeightOpConverter : public OpConverter {
 
     auto* X = engine_->GetITensor(op_desc.Input("X").front());
     nvinfer1::Dims dims_x = X->getDimensions();
-    PADDLE_ENFORCE(dims_x.nbDims >= 3, "x dims experts 3, but %d is given.",
-                   dims_x.nbDims);
+    std::vector<int> no_batch_dims;
+    int start_index = 0;
+
+    if (engine_->with_dynamic_shape()) start_index = 1;
+    for (; start_index < dims_x.nbDims; start_index++)
+      no_batch_dims.push_back(dims_x.d[start_index]);
 
     auto* Y_v = scope.FindVar(op_desc.Input("Y").front());
     PADDLE_ENFORCE_NOT_NULL(Y_v);
@@ -62,23 +66,23 @@ class ElementwiseWeightOpConverter : public OpConverter {
     auto scale_mode = nvinfer1::ScaleMode::kELEMENTWISE;
 
     std::vector<int> dims_y = framework::vectorize<int>(Y_t->dims());
-    if (static_cast<int>(dims_y.size()) == dims_x.nbDims + 1) {
+    if (dims_y.size() == no_batch_dims.size() + 1) {
       if (dims_y[0] == 1) dims_y.erase(dims_y.begin());
     }
 
-    if (static_cast<int>(dims_y.size()) == 1 && dims_y[0] == dims_x.d[0]) {
+    if (dims_y.size() == 1 && dims_y[0] == no_batch_dims[0]) {
       scale_mode = nvinfer1::ScaleMode::kCHANNEL;
-    } else if (static_cast<int>(dims_y.size()) == dims_x.nbDims &&
-               dims_y[0] == dims_x.d[0]) {
+    } else if (dims_y.size() == no_batch_dims.size() &&
+               dims_y[0] == no_batch_dims[0]) {
       scale_mode = nvinfer1::ScaleMode::kELEMENTWISE;
-      for (int i = 1; i < dims_x.nbDims; i++) {
-        if (dims_y[i] != dims_x.d[i]) {
+      for (size_t i = 1; i < no_batch_dims.size(); i++) {
+        if (dims_y[i] != no_batch_dims[i]) {
           scale_mode = nvinfer1::ScaleMode::kCHANNEL;
           break;
         }
       }
       if (scale_mode == nvinfer1::ScaleMode::kCHANNEL) {
-        for (int i = 1; i < dims_x.nbDims; i++) {
+        for (size_t i = 1; i < no_batch_dims.size(); i++) {
           if (dims_y[i] != 1)
             PADDLE_THROW(
                 "TensorRT unsupported weight shape for Elementwise op!");
diff --git a/paddle/fluid/inference/tensorrt/convert/op_converter.h b/paddle/fluid/inference/tensorrt/convert/op_converter.h
index ca5e1b8a7405769300c31d0f048b27758d474cf7..a299d845662c10a4ee29f119b806b367f4a6cd83 100644
--- a/paddle/fluid/inference/tensorrt/convert/op_converter.h
+++ b/paddle/fluid/inference/tensorrt/convert/op_converter.h
@@ -23,52 +23,13 @@ limitations under the License. */
 #include "paddle/fluid/framework/scope.h"
 #include "paddle/fluid/inference/analysis/helper.h"
 #include "paddle/fluid/inference/tensorrt/engine.h"
+#include "paddle/fluid/inference/tensorrt/helper.h"
 #include "paddle/fluid/inference/utils/singleton.h"
 
 namespace paddle {
 namespace inference {
 namespace tensorrt {
 
-using FluidDT = framework::proto::VarType_Type;
-using TRT_DT = nvinfer1::DataType;
-
-namespace {  // NOLINT
-
-TRT_DT FluidDataType2TRT(FluidDT type) {
-  switch (type) {
-    case FluidDT::VarType_Type_FP32:
-      return TRT_DT::kFLOAT;
-    case FluidDT::VarType_Type_INT32:
-      return TRT_DT::kINT32;
-    default:
-      return TRT_DT::kINT32;
-  }
-  PADDLE_THROW(platform::errors::InvalidArgument(
-      "unknown fluid datatype in TRT op converter"));
-  return TRT_DT::kINT32;
-}
-
-nvinfer1::Dims Vec2TRT_Dims(const std::vector<int64_t>& shape,
-                            std::string input) {
-  PADDLE_ENFORCE_GT(shape.size(), 1UL,
-                    platform::errors::InvalidArgument(
-                        "TensorRT's tensor input requires at least 2 "
-                        "dimensions, but input %s has %d dims.",
-                        input, shape.size()));
-  PADDLE_ENFORCE_LE(shape.size(), 4UL,
-                    platform::errors::InvalidArgument(
-                        "TensorRT's tensor input requires at most 4 "
-                        "dimensions, but input %s has %d dims.",
-                        input, shape.size()));
-  if (shape.size() == 4UL)
-    return nvinfer1::DimsCHW(shape[1], shape[2], shape[3]);
-  else if (shape.size() == 3UL)
-    return nvinfer1::Dims2(shape[1], shape[2]);
-  return nvinfer1::DimsCHW(shape[1], 1, 1);
-}
-
-}  // namespace // NOLINT
-
 /*
  * Convert Op from Fluid to TensorRT Engine.
  */
@@ -167,11 +128,37 @@ class OpConverter {
       PADDLE_ENFORCE_EQ(var->GetType(), FluidDT::VarType_Type_LOD_TENSOR,
                         "TensorRT engine only takes LoDTensor as input");
       auto var_shape = var->GetShape();
-
-      engine->DeclareInput(
-          input, FluidDataType2TRT(
-                     var->Proto()->type().lod_tensor().tensor().data_type()),
-          Vec2TRT_Dims(var_shape, input));
+      if (engine->with_dynamic_shape()) {
+#if IS_TRT_VERSION_GE(6000)
+        auto min_input_shape = engine->min_input_shape()[input];
+        auto max_input_shape = engine->max_input_shape()[input];
+        auto optim_input_shape = engine->optim_input_shape()[input];
+        size_t ranks = min_input_shape.size();
+        std::vector<int64_t> input_shape;
+        input_shape.push_back(-1);
+        for (size_t i = 1; i < ranks; i++) {
+          if (min_input_shape[i] != max_input_shape[i]) {
+            input_shape.push_back(-1);
+          } else {
+            input_shape.push_back(min_input_shape[i]);
+            // the i dimension should be same.
+            PADDLE_ENFORCE_EQ(min_input_shape[i], optim_input_shape[i],
+                              platform::errors::InvalidArgument(
+                                  "The dim (%d) of the min_input_shape and "
+                                  "optim_input_shape should be same."));
+          }
+        }
+        engine->DeclareInput(
+            input, FluidDataType2TRT(
+                       var->Proto()->type().lod_tensor().tensor().data_type()),
+            Vec2TRT_Dims(input_shape, input, true));
+#endif
+      } else {
+        engine->DeclareInput(
+            input, FluidDataType2TRT(
+                       var->Proto()->type().lod_tensor().tensor().data_type()),
+            Vec2TRT_Dims(var_shape, input));
+      }
     }
     framework::proto::BlockDesc* block_proto = block_desc->Proto();
     ConvertBlock(*block_proto, parameters, scope, engine);
diff --git a/paddle/fluid/inference/tensorrt/engine.cc b/paddle/fluid/inference/tensorrt/engine.cc
index e7f7a842cf5725d4c83f1c4b8205ba32515a79fd..af9a580c75787e59e13bab3eb2af63bd99f3a339 100644
--- a/paddle/fluid/inference/tensorrt/engine.cc
+++ b/paddle/fluid/inference/tensorrt/engine.cc
@@ -28,23 +28,35 @@ namespace tensorrt {
 
 int TensorRTEngine::runtime_batch_ = 1;
 
-void TensorRTEngine::Build(const DescType &paddle_model) {
-  PADDLE_ENFORCE(false, "not implemented");
+void TensorRTEngine::InitNetwork() {
+  freshDeviceId();
+  infer_builder_.reset(createInferBuilder(&logger_));
+
+  if (with_dynamic_shape_) {
+#if IS_TRT_VERSION_GE(6000)
+    infer_networkv2_.reset(infer_builder_->createNetworkV2(
+        1U << static_cast<int>(
+            nvinfer1::NetworkDefinitionCreationFlag::kEXPLICIT_BATCH)));
+    infer_builder_config_.reset(infer_builder_->createBuilderConfig());
+    infer_ptr<nvinfer1::IBuilderConfig> infer_builder_config_;
+    optim_profile_.reset(infer_builder_->createOptimizationProfile());
+#endif
+  } else {
+    infer_network_.reset(infer_builder_->createNetwork());
+  }
 }
 
 void TensorRTEngine::Execute(int batch_size, std::vector<void *> *buffers,
                              cudaStream_t stream) {
   freshDeviceId();
-  const std::thread::id tid = std::this_thread::get_id();
-  batch_size_ = batch_size;
-  if (infer_context_.find(tid) == infer_context_.end()) {
-    std::unique_lock<std::mutex> lock(mutex_);
-    PADDLE_ENFORCE_NOT_NULL(
-        infer_engine_,
-        "You should build engine first and then set the context.");
-    infer_context_[tid].reset(infer_engine_->createExecutionContext());
+  auto infer_context = context();
+  if (!with_dynamic_shape()) {
+    infer_context->enqueue(batch_size, buffers->data(), stream, nullptr);
+  } else {
+#if IS_TRT_VERSION_GE(6000)
+    infer_context->enqueueV2(buffers->data(), stream, nullptr);
+#endif
   }
-  infer_context_[tid]->enqueue(batch_size, buffers->data(), stream, nullptr);
   SetRuntimeBatch(batch_size);
 }
 
@@ -53,8 +65,9 @@ void TensorRTEngine::FreezeNetwork() {
   VLOG(3) << "TRT to freeze network";
   PADDLE_ENFORCE(infer_builder_ != nullptr,
                  "Call InitNetwork first to initialize network.");
-  PADDLE_ENFORCE(infer_network_ != nullptr,
-                 "Call InitNetwork first to initialize network.");
+  PADDLE_ENFORCE_EQ(network() != nullptr, true,
+                    platform::errors::InvalidArgument(
+                        "Call InitNetwork first to initialize network."));
   // build engine.
   infer_builder_->setMaxBatchSize(max_batch_);
   infer_builder_->setMaxWorkspaceSize(max_workspace_);
@@ -66,6 +79,8 @@ void TensorRTEngine::FreezeNetwork() {
     if (!support_fp16) {
       LOG(INFO) << "You specify FP16 mode, but the hardware do not support "
                    "FP16 speed up, use FP32 instead.";
+    } else {
+      LOG(INFO) << "Run Paddle-TRT FP16 mode";
     }
   }
 #else
@@ -92,14 +107,14 @@ void TensorRTEngine::FreezeNetwork() {
       }
 
       std::unordered_set<nvinfer1::ITensor *> all_t;
-      for (int i = 0; i < infer_network_->getNbLayers(); i++) {
-        auto layer = infer_network_->getLayer(i);
+      for (int i = 0; i < network()->getNbLayers(); i++) {
+        auto layer = network()->getLayer(i);
         for (int j = 0; j < layer->getNbOutputs(); j++) {
           all_t.insert(layer->getOutput(j));
         }
       }
-      for (int i = 0; i < infer_network_->getNbInputs(); i++) {
-        all_t.insert(infer_network_->getInput(i));
+      for (int i = 0; i < network()->getNbInputs(); i++) {
+        all_t.insert(network()->getInput(i));
       }
 
       for (auto &t : all_t) {
@@ -110,14 +125,14 @@ void TensorRTEngine::FreezeNetwork() {
         }
       }
       std::unordered_set<std::string> all_out_t_name;
-      for (int i = 0; i < infer_network_->getNbOutputs(); i++) {
-        auto *temp = infer_network_->getOutput(i);
+      for (int i = 0; i < network()->getNbOutputs(); i++) {
+        auto *temp = network()->getOutput(i);
         temp->setDynamicRange(-1, 1);
         all_out_t_name.insert(temp->getName());
       }
 
-      for (int i = 0; i < infer_network_->getNbLayers(); i++) {
-        auto layer = infer_network_->getLayer(i);
+      for (int i = 0; i < network()->getNbLayers(); i++) {
+        auto layer = network()->getLayer(i);
         for (int j = 0; j < layer->getNbOutputs(); j++) {
           auto *temp_out = layer->getOutput(j);
           if (std::find(all_out_t_name.begin(), all_out_t_name.end(),
@@ -127,26 +142,41 @@ void TensorRTEngine::FreezeNetwork() {
           }
         }
       }
-
 #endif
     }
   }
 
-  infer_engine_.reset(infer_builder_->buildCudaEngine(*infer_network_));
+  if (with_dynamic_shape_) {
+#if IS_TRT_VERSION_GE(6000)
+    for (auto &input : min_input_shape_) {
+      optim_profile_->setDimensions(
+          input.first.c_str(), nvinfer1::OptProfileSelector::kMIN,
+          Vec2TRT_Dims(input.second, input.first, true));
+      optim_profile_->setDimensions(
+          input.first.c_str(), nvinfer1::OptProfileSelector::kMAX,
+          Vec2TRT_Dims(max_input_shape_[input.first], input.first, true));
+      optim_profile_->setDimensions(
+          input.first.c_str(), nvinfer1::OptProfileSelector::kOPT,
+          Vec2TRT_Dims(optim_input_shape_[input.first], input.first, true));
+    }
+    infer_builder_config_->addOptimizationProfile(optim_profile_.get());
+    infer_engine_.reset(infer_builder_->buildEngineWithConfig(
+        *network(), *infer_builder_config_));
+#endif
+  } else {
+    infer_engine_.reset(infer_builder_->buildCudaEngine(*network()));
+  }
   PADDLE_ENFORCE(infer_engine_ != nullptr, "build cuda engine failed!");
 }
 
 nvinfer1::ITensor *TensorRTEngine::DeclareInput(const std::string &name,
                                                 nvinfer1::DataType dtype,
                                                 const nvinfer1::Dims &dims) {
-  PADDLE_ENFORCE_EQ(0, buffer_sizes_.count(name), "duplicate input name %s",
-                    name);
-
-  PADDLE_ENFORCE(infer_network_ != nullptr, "should initnetwork first");
-  auto *input = infer_network_->addInput(name.c_str(), dtype, dims);
+  PADDLE_ENFORCE_EQ(network() != nullptr, true,
+                    platform::errors::InvalidArgument(
+                        "The TRT network should be initialized first."));
+  auto *input = network()->addInput(name.c_str(), dtype, dims);
   PADDLE_ENFORCE(input, "infer network add input %s failed", name);
-  buffer_sizes_[name] = kDataTypeSize[static_cast<int>(dtype)] *
-                        analysis::AccuDims(dims.d, dims.nbDims) * max_batch_;
   PADDLE_ENFORCE(input->isNetworkInput());
   TensorRTEngine::SetITensor(name, input);
   return input;
@@ -154,37 +184,21 @@ nvinfer1::ITensor *TensorRTEngine::DeclareInput(const std::string &name,
 
 void TensorRTEngine::DeclareOutput(const nvinfer1::ILayer *layer, int offset,
                                    const std::string &name) {
-  PADDLE_ENFORCE_EQ(0, buffer_sizes_.count(name), "duplicate output name %s",
-                    name);
-
   auto *output = layer->getOutput(offset);
   SetITensor(name, output);
   PADDLE_ENFORCE(output != nullptr);
   output->setName(name.c_str());
   PADDLE_ENFORCE(!output->isNetworkInput());
-  infer_network_->markOutput(*output);
+  network()->markOutput(*output);
   PADDLE_ENFORCE(output->isNetworkOutput());
-  // output buffers' size can only be decided later, set zero here to mark this
-  // and will reset later.
-  buffer_sizes_[name] = 0;
-}
-
-bool TensorRTEngine::HasDeclared(const std::string &name) {
-  return buffer_sizes_.count(name) > 0;
 }
 
 void TensorRTEngine::DeclareOutput(const std::string &name) {
-  PADDLE_ENFORCE_EQ(0, buffer_sizes_.count(name), "duplicate output name %s",
-                    name);
-
   auto *output = TensorRTEngine::GetITensor(name);
   PADDLE_ENFORCE(output != nullptr);
   output->setName(name.c_str());
   PADDLE_ENFORCE(!output->isNetworkInput());
-  infer_network_->markOutput(*output);
-  // output buffers' size can only be decided later, set zero here to mark this
-  // and will reset later.
-  buffer_sizes_[name] = 0;
+  network()->markOutput(*output);
 }
 
 void TensorRTEngine::SetITensor(const std::string &name,
@@ -253,7 +267,7 @@ nvinfer1::IPluginLayer *TensorRTEngine::AddPlugin(
     nvinfer1::ITensor *const *inputs, int num_inputs,
     plugin::PluginTensorRT *plugin) {
   owned_plugin_.emplace_back(plugin);
-  return infer_network_.get()->addPluginExt(inputs, num_inputs, *plugin);
+  return network()->addPluginExt(inputs, num_inputs, *plugin);
 }
 
 void TensorRTEngine::freshDeviceId() {
diff --git a/paddle/fluid/inference/tensorrt/engine.h b/paddle/fluid/inference/tensorrt/engine.h
index d847ce4b5df3a047fb9366d5232aefbf7814f2fd..c209bbd04c9c4ec4f96fbf9d919f17f4d73567e8 100644
--- a/paddle/fluid/inference/tensorrt/engine.h
+++ b/paddle/fluid/inference/tensorrt/engine.h
@@ -17,6 +17,7 @@ limitations under the License. */
 #include <NvInfer.h>
 #include <map>
 #include <memory>
+#include <mutex>  // NOLINT
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
@@ -36,6 +37,57 @@ namespace paddle {
 namespace inference {
 namespace tensorrt {
 
+using FluidDT = framework::proto::VarType_Type;
+using TRT_DT = nvinfer1::DataType;
+
+namespace {  // NOLINT
+
+TRT_DT FluidDataType2TRT(FluidDT type) {
+  switch (type) {
+    case FluidDT::VarType_Type_FP32:
+      return TRT_DT::kFLOAT;
+    case FluidDT::VarType_Type_INT32:
+      return TRT_DT::kINT32;
+    default:
+      return TRT_DT::kINT32;
+  }
+  PADDLE_THROW(platform::errors::InvalidArgument(
+      "unknown fluid datatype in TRT op converter"));
+  return TRT_DT::kINT32;
+}
+
+// The T can be int32 or int64 type.
+template <typename T>
+nvinfer1::Dims Vec2TRT_Dims(const std::vector<T>& shape, std::string input,
+                            bool with_dynamic_shape = false) {
+  PADDLE_ENFORCE_GT(shape.size(), 1UL,
+                    platform::errors::InvalidArgument(
+                        "TensorRT's tensor input requires at least 2 "
+                        "dimensions, but input %s has %d dims.",
+                        input, shape.size()));
+  PADDLE_ENFORCE_LE(shape.size(), 4UL,
+                    platform::errors::InvalidArgument(
+                        "TensorRT's tensor input requires at most 4 "
+                        "dimensions, but input %s has %d dims.",
+                        input, shape.size()));
+  if (!with_dynamic_shape) {
+    if (shape.size() == 4UL) {
+      return nvinfer1::DimsCHW(shape[1], shape[2], shape[3]);
+    } else if (shape.size() == 3UL) {
+      return nvinfer1::Dims2(shape[1], shape[2]);
+    }
+    return nvinfer1::DimsCHW(shape[1], 1, 1);
+  } else {
+    if (shape.size() == 4UL) {
+      return nvinfer1::DimsNCHW(shape[0], shape[1], shape[2], shape[3]);
+    } else if (shape.size() == 3UL) {
+      return nvinfer1::Dims3(shape[0], shape[1], shape[2]);
+    }
+    return nvinfer1::Dims4(shape[0], shape[1], 1, 1);
+  }
+}
+}  // NOLINT
+
 class TRTInt8Calibrator;
 /*
  * TensorRT Engine.
@@ -45,6 +97,7 @@ class TRTInt8Calibrator;
  */
 class TensorRTEngine {
   using DescType = ::paddle::framework::proto::BlockDesc;
+  using ShapeMapType = std::map<std::string, std::vector<int>>;
 
  public:
   // Weight is model parameter.
@@ -68,33 +121,44 @@ class TensorRTEngine {
       int max_batch, int max_workspace,
       AnalysisConfig::Precision precision = AnalysisConfig::Precision::kFloat32,
       TRTInt8Calibrator* calibrator = nullptr, int device_id = 0,
+      const ShapeMapType min_input_shape = {},
+      const ShapeMapType max_input_shape = {},
+      const ShapeMapType optim_input_shape = {},
       nvinfer1::ILogger& logger = NaiveLogger::Global())
       : max_batch_(max_batch),
         max_workspace_(max_workspace),
         precision_(precision),
         calibrator_(calibrator),
         device_id_(device_id),
-        logger_(logger) {}
+        min_input_shape_(min_input_shape),
+        max_input_shape_(max_input_shape),
+        optim_input_shape_(optim_input_shape),
+        logger_(logger) {
+    if (min_input_shape_.size() != 0 && max_input_shape_.size() != 0 &&
+        optim_input_shape_.size() != 0) {
+      PADDLE_ENFORCE_EQ(
+          min_input_shape_.size(), max_input_shape_.size(),
+          platform::errors::InvalidArgument(
+              "The min_input_shape_'s size(%d) should be equal to the "
+              "size(%d) of max_input_shape_",
+              min_input_shape_.size(), max_input_shape_.size()));
+      PADDLE_ENFORCE_EQ(
+          min_input_shape_.size(), optim_input_shape_.size(),
+          platform::errors::InvalidArgument(
+              "The min_input_shape_'s size(%d) should be equal to the "
+              "size(%d) of optim_input_shape_",
+              min_input_shape_.size(), optim_input_shape_.size()));
+#if IS_TRT_VERSION_GE(6000)
+      with_dynamic_shape_ = true;
+#else
+      LOG(WARNING) << "Using dynamic shape of TRT need ensure that the TRT "
+                      "version should be at least 6.";
+#endif
+    }
+  }
 
   ~TensorRTEngine() {}
 
-  // TODO(Superjomn) implement it later when graph segmentation is supported.
-  void Build(const DescType& paddle_model);
-
-  void Execute(int batch_size, std::vector<void*>* buffers,
-               cudaStream_t stream = nullptr);
-
-  // Initialize the inference network, so that TensorRT layers can add to this
-  // network.
-  void InitNetwork() {
-    freshDeviceId();
-    infer_builder_.reset(createInferBuilder(&logger_));
-    infer_network_.reset(infer_builder_->createNetwork());
-  }
-  // After finishing adding ops, freeze this network and creates the execution
-  // environment.
-  void FreezeNetwork();
-
   // Add an input and set its name, data type and dimension.
   nvinfer1::ITensor* DeclareInput(const std::string& name,
                                   nvinfer1::DataType dtype,
@@ -105,15 +169,24 @@ class TensorRTEngine {
                      const std::string& name);
   // Set the itensor_map_[name] as the network's output, and set its name.
   void DeclareOutput(const std::string& name);
-  // Check if the ITensor has been declared
-  bool HasDeclared(const std::string& name);
 
   void SetITensor(const std::string& name, nvinfer1::ITensor* tensor);
   // Get an ITensor called name.
   nvinfer1::ITensor* GetITensor(const std::string& name);
 
   nvinfer1::ICudaEngine* engine() { return infer_engine_.get(); }
-  nvinfer1::INetworkDefinition* network() { return infer_network_.get(); }
+  nvinfer1::IExecutionContext* context() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    const std::thread::id tid = std::this_thread::get_id();
+    if (infer_context_.find(tid) == infer_context_.end()) {
+      PADDLE_ENFORCE_NOT_NULL(
+          infer_engine_,
+          platform::errors::InvalidArgument(
+              "You should build engine first and then set the context."));
+      infer_context_[tid].reset(infer_engine_->createExecutionContext());
+    }
+    return infer_context_[tid].get();
+  }
 
   nvinfer1::IHostMemory* Serialize() {
     PADDLE_ENFORCE(infer_engine_ != nullptr,
@@ -170,6 +243,30 @@ class TensorRTEngine {
     }
   }
 
+  // NOTE: The func bellow was modified to adapt the dynamic shape.
+  // Initialize the inference network, so that TensorRT layers can add to this
+  // network.
+  void InitNetwork();
+  // After finishing adding ops, freeze this network and creates the execution
+  // environment.
+  void FreezeNetwork();
+  void Execute(int batch_size, std::vector<void*>* buffers,
+               cudaStream_t stream = nullptr);
+
+  nvinfer1::INetworkDefinition* network() {
+    if (with_dynamic_shape_) {
+      return infer_networkv2_.get();
+    } else {
+      return infer_network_.get();
+    }
+  }
+
+  ShapeMapType min_input_shape() { return min_input_shape_; }
+  ShapeMapType max_input_shape() { return max_input_shape_; }
+  ShapeMapType optim_input_shape() { return optim_input_shape_; }
+
+  bool with_dynamic_shape() { return with_dynamic_shape_; }
+
  private:
   // Each ICudaEngine object is bound to a specific GPU when it is instantiated,
   // ensure that the thread is associated with the correct device by calling
@@ -189,10 +286,12 @@ class TensorRTEngine {
   int batch_size_{-1};
 
   int device_id_;
+  ShapeMapType min_input_shape_;
+  ShapeMapType max_input_shape_;
+  ShapeMapType optim_input_shape_;
   nvinfer1::ILogger& logger_;
 
   // max data size for the buffers.
-  std::unordered_map<std::string /*name*/, size_t /*max size*/> buffer_sizes_;
   std::unordered_map<std::string /*name*/, nvinfer1::ITensor* /*ITensor*/>
       itensor_map_;
 
@@ -216,13 +315,17 @@ class TensorRTEngine {
       infer_context_;
   infer_ptr<nvinfer1::IHostMemory> ihost_memory_;
   std::unordered_map<nvinfer1::ITensor*, float> quant_dynamic_range_;
+
+  // For dynamic shape
+  bool with_dynamic_shape_{false};
+  infer_ptr<nvinfer1::INetworkDefinition> infer_networkv2_;
+#if IS_TRT_VERSION_GE(6000)
+  infer_ptr<nvinfer1::IBuilderConfig> infer_builder_config_;
+  std::unique_ptr<nvinfer1::IOptimizationProfile> optim_profile_;
+#endif
   std::mutex mutex_;
 };  // class TensorRTEngine
 
-#define IS_TRT_VERSION_GE(version)                       \
-  ((NV_TENSORRT_MAJOR * 1000 + NV_TENSORRT_MINOR * 100 + \
-    NV_TENSORRT_PATCH * 10 + NV_TENSORRT_BUILD) >= version)
-
 // Add a layer__ into engine__ with args ARGS.
 // For example:
 //
@@ -252,9 +355,13 @@ class TRTEngineManager {
       std::string name, int max_batch, int max_workspace,
       AnalysisConfig::Precision precision = AnalysisConfig::Precision::kFloat32,
       TRTInt8Calibrator* calibrator = nullptr, int device_id = 0,
+      const std::map<std::string, std::vector<int>> min_input_shape = {},
+      const std::map<std::string, std::vector<int>> max_input_shape = {},
+      const std::map<std::string, std::vector<int>> optim_input_shape = {},
       nvinfer1::ILogger& logger = NaiveLogger::Global()) {
     auto* p = new TensorRTEngine(max_batch, max_workspace, precision,
-                                 calibrator, device_id, logger);
+                                 calibrator, device_id, min_input_shape,
+                                 max_input_shape, optim_input_shape, logger);
     engines_[name].reset(p);
     return p;
   }
diff --git a/paddle/fluid/inference/tensorrt/helper.h b/paddle/fluid/inference/tensorrt/helper.h
index 010942a0678fe9a592d1a95ba9cdc6adc42cc2ec..037dabf5d5888aecdaf781de474c35098be144c1 100644
--- a/paddle/fluid/inference/tensorrt/helper.h
+++ b/paddle/fluid/inference/tensorrt/helper.h
@@ -27,6 +27,14 @@ namespace paddle {
 namespace inference {
 namespace tensorrt {
 
+#define IS_TRT_VERSION_GE(version)                       \
+  ((NV_TENSORRT_MAJOR * 1000 + NV_TENSORRT_MINOR * 100 + \
+    NV_TENSORRT_PATCH * 10 + NV_TENSORRT_BUILD) >= version)
+
+#define TRT_VERSION                                    \
+  NV_TENSORRT_MAJOR * 1000 + NV_TENSORRT_MINOR * 100 + \
+      NV_TENSORRT_PATCH * 10 + NV_TENSORRT_BUILD
+
 namespace dy = paddle::platform::dynload;
 
 // TensorRT data type to size
@@ -103,6 +111,14 @@ class NaiveProfiler : public nvinfer1::IProfiler {
   }
 };
 
+inline size_t ProductDim(const nvinfer1::Dims& dims) {
+  size_t v = 1;
+  for (int i = 0; i < dims.nbDims; i++) {
+    v *= dims.d[i];
+  }
+  return v;
+}
+
 }  // namespace tensorrt
 }  // namespace inference
 }  // namespace paddle
diff --git a/paddle/fluid/inference/tests/api/CMakeLists.txt b/paddle/fluid/inference/tests/api/CMakeLists.txt
index 6e2b8a50bf19c6573762610ad870f02e66d07c00..c281cd8bccd86a39993e04cde49fe8f453c8c636 100644
--- a/paddle/fluid/inference/tests/api/CMakeLists.txt
+++ b/paddle/fluid/inference/tests/api/CMakeLists.txt
@@ -374,6 +374,14 @@ if(WITH_GPU AND TENSORRT_FOUND)
     inference_analysis_test(trt_quant_int8_test SRCS trt_quant_int8_test.cc
             EXTRA_DEPS ${INFERENCE_EXTRA_DEPS}
             ARGS --infer_model=${TRT_MODEL_QUANT_RESNET_DIR})
+
+    set(TEST_TRT_DYNAMIC_MODEL "${TRT_MODEL_INSTALL_DIR}/test_trt_dy_conv")
+    if (NOT EXISTS ${TEST_TRT_DYNAMIC_MODEL})
+        inference_download_and_uncompress(${TEST_TRT_DYNAMIC_MODEL} ${INFERENCE_URL}/tensorrt_test "test_trt_dy_conv.tar.gz")
+    endif()
+    inference_analysis_test(trt_dynamic_shape_test SRCS trt_dynamic_shape_test.cc
+            EXTRA_DEPS ${INFERENCE_EXTRA_DEPS}
+            ARGS --infer_model=${TEST_TRT_DYNAMIC_MODEL})
 endif()
 
 set(LITE_MODEL_INSTALL_DIR "${INFERENCE_DEMO_INSTALL_DIR}/lite")
diff --git a/paddle/fluid/inference/tests/api/trt_dynamic_shape_test.cc b/paddle/fluid/inference/tests/api/trt_dynamic_shape_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9c186c5973520f90c9dab9d9dea97901fee151fa
--- /dev/null
+++ b/paddle/fluid/inference/tests/api/trt_dynamic_shape_test.cc
@@ -0,0 +1,66 @@
+/* Copyright (c) 2018 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. */
+
+#include <gflags/gflags.h>
+#include <glog/logging.h>
+#include <gtest/gtest.h>
+
+#include "paddle/fluid/inference/tests/api/trt_test_helper.h"
+
+namespace paddle {
+namespace inference {
+
+TEST(AnalysisPredictor, use_gpu) {
+  std::string model_dir = FLAGS_infer_model + "/test_trt_dy_conv";
+  AnalysisConfig config;
+  config.EnableUseGpu(100, 0);
+  config.SetModel(model_dir);
+  config.SwitchUseFeedFetchOps(false);
+  // Set the input's min, max, opt shape
+  std::map<std::string, std::vector<int>> min_input_shape = {
+      {"image", {1, 1, 3, 3}}};
+  std::map<std::string, std::vector<int>> max_input_shape = {
+      {"image", {1, 1, 10, 10}}};
+  std::map<std::string, std::vector<int>> opt_input_shape = {
+      {"image", {1, 1, 3, 3}}};
+  config.EnableTensorRtEngine(
+      1 << 30, 1, 1, AnalysisConfig::Precision::kFloat32, false, true,
+      min_input_shape, max_input_shape, opt_input_shape);
+  auto predictor = CreatePaddlePredictor(config);
+  auto input_names = predictor->GetInputNames();
+  int channels = 1;
+  int height = 3;
+  int width = 3;
+  int input_num = channels * height * width * 1;
+
+  float *input = new float[input_num];
+  memset(input, 0, input_num * sizeof(float));
+  auto input_t = predictor->GetInputTensor(input_names[0]);
+  input_t->Reshape({1, channels, height, width});
+  input_t->copy_from_cpu(input);
+
+  ASSERT_TRUE(predictor->ZeroCopyRun());
+
+  std::vector<float> out_data;
+  auto output_names = predictor->GetOutputNames();
+  auto output_t = predictor->GetOutputTensor(output_names[0]);
+  std::vector<int> output_shape = output_t->shape();
+  int out_num = std::accumulate(output_shape.begin(), output_shape.end(), 1,
+                                std::multiplies<int>());
+  out_data.resize(out_num);
+  output_t->copy_to_cpu(out_data.data());
+}
+
+}  // namespace inference
+}  // namespace paddle
diff --git a/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h b/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h
index 3a33c8be101ecc4323e34d7aa2ed514beac90e92..dc8aa57e6d7d148e70b279e3c92c3c188316ecf5 100644
--- a/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h
+++ b/paddle/fluid/operators/tensorrt/tensorrt_engine_op.h
@@ -29,6 +29,7 @@
 #include "paddle/fluid/inference/analysis/helper.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/engine.h"
+#include "paddle/fluid/inference/tensorrt/helper.h"
 
 namespace paddle {
 
@@ -40,6 +41,29 @@ using inference::tensorrt::TRTInt8Calibrator;
 using inference::tensorrt::TRTCalibratorEngine;
 using inference::tensorrt::TRTCalibratorEngineManager;
 
+static void RuntimeStaticShapeCheck(std::vector<int64_t> runtime_input_shape,
+                                    std::vector<int64_t> model_input_shape) {
+  auto comma_fold = [](std::string a, int b) {
+    return std::move(a) + ", " + std::to_string(b);
+  };
+  std::string model_input_shape_str = std::accumulate(
+      std::next(model_input_shape.begin()), model_input_shape.end(),
+      std::to_string(model_input_shape[0]), comma_fold);
+  std::string runtime_input_shape_str = std::accumulate(
+      std::next(runtime_input_shape.begin()), runtime_input_shape.end(),
+      std::to_string(runtime_input_shape[0]), comma_fold);
+  PADDLE_ENFORCE_EQ(
+      model_input_shape == runtime_input_shape, true,
+      platform::errors::InvalidArgument(
+          "Input shapes are inconsistent with the model. Expect [%s] in "
+          "model description, but got [%s] in runtime. TRT 5 "
+          "or lower version "
+          "does not support dynamic input shapes. Please check and "
+          "modify "
+          "your input shapes.",
+          model_input_shape_str, runtime_input_shape_str));
+}
+
 class TensorRTEngineOp : public framework::OperatorBase {
  private:
   std::vector<std::string> input_names_;
@@ -206,39 +230,28 @@ class TensorRTEngineOp : public framework::OperatorBase {
       auto &t =
           inference::analysis::GetFromScope<framework::LoDTensor>(scope, x);
       auto t_shape = framework::vectorize<int64_t>(t.dims());
-      // check if the input shapes are consistent with model.
-      if (HasAttr(x + "_shape")) {
-        std::vector<int64_t> i_shape = Attr<std::vector<int64_t>>(x + "_shape");
-        std::vector<int64_t> model_input_shape(i_shape.begin() + 1,
-                                               i_shape.end());
-        std::vector<int64_t> runtime_input_shape(t_shape.begin() + 1,
-                                                 t_shape.end());
-        auto comma_fold = [](std::string a, int b) {
-          return std::move(a) + ", " + std::to_string(b);
-        };
-        std::string model_input_shape_str = std::accumulate(
-            std::next(model_input_shape.begin()), model_input_shape.end(),
-            std::to_string(model_input_shape[0]), comma_fold);
-        std::string runtime_input_shape_str = std::accumulate(
-            std::next(runtime_input_shape.begin()), runtime_input_shape.end(),
-            std::to_string(runtime_input_shape[0]), comma_fold);
-        PADDLE_ENFORCE_EQ(
-            model_input_shape == runtime_input_shape, true,
-            platform::errors::InvalidArgument(
-                "Input shapes are inconsistent with the model. Expect [%s] in "
-                "model description, but got [%s] in runtime. TRT 5 "
-                "or lower version "
-                "does not support dynamic input shapes. Please check and "
-                "modify "
-                "your input shapes.",
-                model_input_shape_str, runtime_input_shape_str));
-      }
-
       runtime_batch = t_shape[0];
-
       const int bind_index = engine->engine()->getBindingIndex(x.c_str());
       PADDLE_ENFORCE(bind_index < num_bindings,
                      "The bind index should be less than num_bindings");
+      if (!engine->with_dynamic_shape()) {
+        // check if the input shapes are consistent with model.
+        if (HasAttr(x + "_shape")) {
+          std::vector<int64_t> i_shape =
+              Attr<std::vector<int64_t>>(x + "_shape");
+          std::vector<int64_t> model_input_shape(i_shape.begin() + 1,
+                                                 i_shape.end());
+          std::vector<int64_t> runtime_input_shape(t_shape.begin() + 1,
+                                                   t_shape.end());
+          RuntimeStaticShapeCheck(runtime_input_shape, model_input_shape);
+        }
+      } else {
+#if IS_TRT_VERSION_GE(6000)
+        auto *trt_context = engine->context();
+        trt_context->setBindingDimensions(
+            bind_index, inference::tensorrt::Vec2TRT_Dims(t_shape, x, true));
+#endif
+      }
       buffers[bind_index] = static_cast<void *>(t.data<float>());
     }
 
@@ -248,13 +261,20 @@ class TensorRTEngineOp : public framework::OperatorBase {
     for (const auto &y : Outputs("Ys")) {
       const int bind_index =
           engine->engine()->getBindingIndex(output_maps[output_index].c_str());
-      auto dims = engine->engine()->getBindingDimensions(bind_index);
-      // Use the output ITensor's dims to reshape the Fluid Tensor.
-      // The ITensor doesn't contain the batch size dim.
       std::vector<int> ddim;
-      ddim.push_back(runtime_batch);
-      for (int i = 0; i < dims.nbDims; i++) {
-        ddim.push_back(dims.d[i]);
+
+      if (!engine->with_dynamic_shape()) {
+        auto dims = engine->engine()->getBindingDimensions(bind_index);
+        ddim.push_back(runtime_batch);
+        for (int i = 0; i < dims.nbDims; i++) {
+          ddim.push_back(dims.d[i]);
+        }
+      } else {
+#if IS_TRT_VERSION_GE(6000)
+        auto *trt_context = engine->context();
+        auto dims = trt_context->getBindingDimensions(bind_index);
+        for (int i = 0; i < dims.nbDims; i++) ddim.push_back(dims.d[i]);
+#endif
       }
       auto *fluid_v = scope.FindVar(y);
       PADDLE_ENFORCE_NOT_NULL(fluid_v, "no output variable called %s", y);
@@ -289,7 +309,6 @@ class TensorRTEngineOp : public framework::OperatorBase {
             runtime_batch, max_batch_size_));
     // Execute the engine.
     engine->Execute(runtime_batch, &buffers, stream);
-    cudaStreamSynchronize(stream);
   }
 
   TensorRTEngine *GetEngine(const framework::Scope &scope,
diff --git a/paddle/fluid/pybind/inference_api.cc b/paddle/fluid/pybind/inference_api.cc
index 2d5aae960acd10005031fb10ede49927e1f2268a..3d4a8963a5af1fa910e70443945731bb56addc1d 100644
--- a/paddle/fluid/pybind/inference_api.cc
+++ b/paddle/fluid/pybind/inference_api.cc
@@ -412,7 +412,13 @@ void BindAnalysisConfig(py::module *m) {
            py::arg("workspace_size") = 1 << 20, py::arg("max_batch_size") = 1,
            py::arg("min_subgraph_size") = 3,
            py::arg("precision_mode") = AnalysisConfig::Precision::kFloat32,
-           py::arg("use_static") = false, py::arg("use_calib_mode") = true)
+           py::arg("use_static") = false, py::arg("use_calib_mode") = true,
+           py::arg("min_input_shape") =
+               std::map<std::string, std::vector<int>>({}),
+           py::arg("max_input_shape") =
+               std::map<std::string, std::vector<int>>({}),
+           py::arg("optim_input_shape") =
+               std::map<std::string, std::vector<int>>({}))
       .def("tensorrt_engine_enabled", &AnalysisConfig::tensorrt_engine_enabled)
       .def("switch_ir_debug", &AnalysisConfig::SwitchIrDebug,
            py::arg("x") = true)
diff --git a/paddle/scripts/build_docker_images.sh b/paddle/scripts/build_docker_images.sh
index c60f42da7aa6351985acaede756d139329ef520c..a90f0885294a9cfb9f65c3cc993cd77025a9dc4a 100644
--- a/paddle/scripts/build_docker_images.sh
+++ b/paddle/scripts/build_docker_images.sh
@@ -6,8 +6,8 @@ REPO="${REPO:-paddlepaddle}"
 cp -f ../../python/requirements.txt .
 
 sed 's#FROM nvidia/cuda:8.0-cudnn7-devel-ubuntu16.04#FROM nvidia/cuda:9.0-cudnn7-devel-ubuntu16.04#g' ../../Dockerfile |
-sed 's#TensorRT-4.0.1.6-ubuntu14.04.x86_64-gnu.cuda.8.0.cudnn7.0.tar.gz#TensorRT_5.1_ga_cuda9_cudnnv7.5.tar.gz#g' |
-sed 's#/usr/local/TensorRT#/usr/local/TensorRT_5.1_ga_cuda9_cudnnv7.5#g' |
+sed 's#TensorRT-4.0.1.6-ubuntu14.04.x86_64-gnu.cuda.8.0.cudnn7.0.tar.gz#TensorRT-6.0.1.5.Ubuntu-16.04.x86_64-gnu.cuda-9.0.cudnn7.6.tar.gz#g' |
+sed 's#/usr/local/TensorRT#/usr/local/TensorRT-6.0.1.5#g' |
 sed 's#libnccl2=2.1.2-1+cuda8.0 libnccl-dev=2.1.2-1+cuda8.0#libnccl2=2.4.7-1+cuda9.0 libnccl-dev=2.4.7-1+cuda9.0#g' |
 sed 's#COPY ./paddle/scripts/docker/root/#COPY ./docker/root/#g' |
 sed 's#COPY ./python/requirements.txt#COPY ./requirements.txt#' > Dockerfile.cuda9.0-cudnn7