diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec
index 08147fdccd51f6899765cae3b5109e68ed27e936..4bdfad93187b0d7e18c4408a578cf5d7ad872b28 100644
--- a/paddle/fluid/API.spec
+++ b/paddle/fluid/API.spec
@@ -200,31 +200,23 @@ paddle.fluid.layers.argsort ArgSpec(args=['input', 'axis', 'name'], varargs=None
 paddle.fluid.layers.ones ArgSpec(args=['shape', 'dtype', 'force_cpu'], varargs=None, keywords=None, defaults=(False,))
 paddle.fluid.layers.zeros ArgSpec(args=['shape', 'dtype', 'force_cpu'], varargs=None, keywords=None, defaults=(False,))
 paddle.fluid.layers.reverse ArgSpec(args=['x', 'axis'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.split_lod_tensor ArgSpec(args=['input', 'mask', 'level'], varargs=None, keywords=None, defaults=(0,))
-paddle.fluid.layers.merge_lod_tensor ArgSpec(args=['in_true', 'in_false', 'x', 'mask', 'level'], varargs=None, keywords=None, defaults=(0,))
 paddle.fluid.layers.While.__init__ ArgSpec(args=['self', 'cond', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.While.block ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.While.complete ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.Switch.__init__ ArgSpec(args=['self', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.Switch.case ArgSpec(args=['self', 'condition'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.Switch.default ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.lod_rank_table ArgSpec(args=['x', 'level'], varargs=None, keywords=None, defaults=(0,))
-paddle.fluid.layers.max_sequence_len ArgSpec(args=['rank_table'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.lod_tensor_to_array ArgSpec(args=['x', 'table'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.array_to_lod_tensor ArgSpec(args=['x', 'table'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.increment ArgSpec(args=['x', 'value', 'in_place'], varargs=None, keywords=None, defaults=(1.0, True))
 paddle.fluid.layers.array_write ArgSpec(args=['x', 'i', 'array'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.create_array ArgSpec(args=['dtype'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.less_than ArgSpec(args=['x', 'y', 'force_cpu', 'cond'], varargs=None, keywords='ignored', defaults=(None, None))
 paddle.fluid.layers.equal ArgSpec(args=['x', 'y', 'cond'], varargs=None, keywords='ignored', defaults=(None,))
 paddle.fluid.layers.array_read ArgSpec(args=['array', 'i'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.shrink_memory ArgSpec(args=['x', 'i', 'table'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.array_length ArgSpec(args=['array'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.IfElse.__init__ ArgSpec(args=['self', 'cond', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.IfElse.false_block ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.IfElse.input ArgSpec(args=['self', 'x'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.IfElse.output ArgSpec(args=['self'], varargs='outs', keywords=None, defaults=None)
-paddle.fluid.layers.IfElse.parent_block ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.IfElse.true_block ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.DynamicRNN.__init__ ArgSpec(args=['self', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.DynamicRNN.block ArgSpec(args=[], varargs='args', keywords='kwds', defaults=None)
@@ -233,9 +225,6 @@ paddle.fluid.layers.DynamicRNN.output ArgSpec(args=['self'], varargs='outputs',
 paddle.fluid.layers.DynamicRNN.static_input ArgSpec(args=['self', 'x'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.DynamicRNN.step_input ArgSpec(args=['self', 'x'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.DynamicRNN.update_memory ArgSpec(args=['self', 'ex_mem', 'new_mem'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.ConditionalBlock.__init__ ArgSpec(args=['self', 'inputs', 'is_scalar_condition', 'name'], varargs=None, keywords=None, defaults=(False, None))
-paddle.fluid.layers.ConditionalBlock.block ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.layers.ConditionalBlock.complete ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.StaticRNN.__init__ ArgSpec(args=['self', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.StaticRNN.complete_op ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.StaticRNN.memory ArgSpec(args=['self', 'init', 'shape', 'batch_ref', 'init_value', 'init_batch_dim_idx', 'ref_batch_dim_idx'], varargs=None, keywords=None, defaults=(None, None, None, 0.0, 0, 1))
diff --git a/paddle/fluid/inference/tensorrt/convert/fc_op.cc b/paddle/fluid/inference/tensorrt/convert/fc_op.cc
index bb603efaf30bb72d74b5583abc45d01a16c076a3..409efac6799b6fb8d27a1343a55e7a508760868f 100644
--- a/paddle/fluid/inference/tensorrt/convert/fc_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/fc_op.cc
@@ -32,11 +32,11 @@ void Reorder2(nvinfer1::DimsHW shape, const T* idata, nvinfer1::DimsHW istrides,
   for (int h = 0; h < shape.h(); ++h) {
     for (int w = 0; w < shape.w(); ++w) {
       odata[h * ostrides.h() + w * ostrides.w()] =
-          idata[h * ostrides.h() + w * ostrides.w()];
+          idata[h * istrides.h() + w * istrides.w()];
     }
   }
 }
-
+// indata c * k
 // Reorder the data layout from CK to KC.
 void ReorderCKtoKC(TensorRTEngine::Weight& iweights,
                    TensorRTEngine::Weight* oweights) {
@@ -79,9 +79,8 @@ class FcOpConverter : public OpConverter {
 
     framework::LoDTensor tmp;
     tmp.Resize(Y_t->dims());
-    memcpy(tmp.mutable_data<float>(platform::CPUPlace()), Y_t->data<float>(),
-           Y_t->dims()[0] * Y_t->dims()[1]);
-
+    memcpy(tmp.mutable_data<float>(platform::CPUPlace()), weight_data,
+           Y_t->dims()[0] * Y_t->dims()[1] * sizeof(float));
     TensorRTEngine::Weight weight{nvinfer1::DataType::kFLOAT,
                                   static_cast<void*>(weight_data),
                                   Y_t->memory_size() / sizeof(float)};
@@ -93,7 +92,7 @@ class FcOpConverter : public OpConverter {
 
     // The data layout of TRT FC layer's weight is different from fluid's FC,
     // need to reorder the elements.
-    ReorderCKtoKC(tmp_weight, &weight);
+    ReorderCKtoKC(weight, &tmp_weight);
 
     // Currently, the framework can only handle one fluid op -> one TRT layer,
     // but fc fuses `mul` and `bias` (2 fluid ops), so here is a trick, just
@@ -103,7 +102,7 @@ class FcOpConverter : public OpConverter {
 
     auto* layer = TRT_ENGINE_ADD_LAYER(engine_, FullyConnected,
                                        *const_cast<nvinfer1::ITensor*>(X),
-                                       n_output, weight.get(), bias.get());
+                                       n_output, tmp_weight.get(), bias.get());
 
     auto output_name = op_desc.Output("Out").front();
     engine_->SetITensor(output_name, layer->getOutput(0));
@@ -118,4 +117,3 @@ class FcOpConverter : public OpConverter {
 }  // namespace paddle
 
 REGISTER_TRT_OP_CONVERTER(fc, FcOpConverter);
-USE_OP(mul);
diff --git a/paddle/fluid/inference/tensorrt/convert/test_activation_op.cc b/paddle/fluid/inference/tensorrt/convert/test_activation_op.cc
index 0a02a7bebf9efbd0555707e6cfa701ef1e7d9659..7dabfd9f6a9a8cfbdd1d9a66541180d3499b7bdc 100644
--- a/paddle/fluid/inference/tensorrt/convert/test_activation_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/test_activation_op.cc
@@ -37,7 +37,7 @@ TEST(ReluOpConverter, main) {
   validator.SetOp(*desc.Proto());
   LOG(INFO) << "execute";
 
-  validator.Execute(10);
+  validator.Execute(1);
 }
 
 }  // namespace tensorrt
diff --git a/paddle/fluid/inference/tensorrt/convert/test_fc_op.cc b/paddle/fluid/inference/tensorrt/convert/test_fc_op.cc
index a30253072ac581ceca85ca10151a176f87a7cb39..081f4d605975f1408d4d8a8ed3108c04d837a4de 100644
--- a/paddle/fluid/inference/tensorrt/convert/test_fc_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/test_fc_op.cc
@@ -23,11 +23,11 @@ namespace tensorrt {
 TEST(fc_op, test) {
   std::unordered_set<std::string> parameters({"mul-Y"});
   framework::Scope scope;
-  TRTConvertValidation validator(20, parameters, scope, 1000);
-
-  validator.DeclInputVar("mul-X", nvinfer1::Dims4(8, 3, 1, 1));
-  validator.DeclParamVar("mul-Y", nvinfer1::Dims2(3, 2));
-  validator.DeclOutputVar("mul-Out", nvinfer1::Dims2(8, 2));
+  TRTConvertValidation validator(10, parameters, scope, 1000);
+  validator.DeclInputVar("mul-X", nvinfer1::Dims4(1, 10, 1, 1));
+  validator.DeclParamVar("mul-Y", nvinfer1::Dims2(10, 2));
+  // validator.DeclParamVar("mul-Y", nvinfer1::Dims2(8, 2));
+  validator.DeclOutputVar("mul-Out", nvinfer1::Dims2(1, 2));
 
   // Prepare Op description
   framework::OpDesc desc;
@@ -38,9 +38,10 @@ TEST(fc_op, test) {
 
   validator.SetOp(*desc.Proto());
 
-  validator.Execute(10);
+  validator.Execute(1);
 }
 
 }  // namespace tensorrt
 }  // namespace inference
 }  // namespace paddle
+USE_OP(mul);
diff --git a/paddle/fluid/inference/tensorrt/convert/test_mul_op.cc b/paddle/fluid/inference/tensorrt/convert/test_mul_op.cc
index 1ce1130e5d660d717a1262a1fbdb4b620462c0b3..674f37f2fdddf013a8f6f4671debbc19c3322423 100644
--- a/paddle/fluid/inference/tensorrt/convert/test_mul_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/test_mul_op.cc
@@ -39,7 +39,7 @@ TEST(MulOpConverter, main) {
   validator.SetOp(*desc.Proto());
   LOG(INFO) << "execute";
 
-  validator.Execute(10);
+  validator.Execute(1);
 }
 
 }  // namespace tensorrt
diff --git a/paddle/fluid/inference/tensorrt/convert/ut_helper.h b/paddle/fluid/inference/tensorrt/convert/ut_helper.h
index 3b1f531adc5d756259df1c350f7f44bf71ee1f93..f14885b238134cdf38a278cd8a0734947bcacfe0 100644
--- a/paddle/fluid/inference/tensorrt/convert/ut_helper.h
+++ b/paddle/fluid/inference/tensorrt/convert/ut_helper.h
@@ -39,7 +39,7 @@ namespace tensorrt {
 float random(float low, float high) {
   static std::random_device rd;
   static std::mt19937 mt(rd());
-  std::uniform_real_distribution<double> dist(1.0, 10.0);
+  std::uniform_real_distribution<double> dist(low, high);
   return dist(mt);
 }
 
@@ -49,6 +49,7 @@ void RandomizeTensor(framework::LoDTensor* tensor, const platform::Place& place,
   size_t num_elements = analysis::AccuDims(dims, dims.size());
   PADDLE_ENFORCE_GT(num_elements, 0);
   auto* data = tensor->mutable_data<float>(place);
+
   for (size_t i = 0; i < num_elements; i++) {
     *(data + i) = random(0., 1.);
   }
@@ -68,7 +69,7 @@ class TRTConvertValidation {
                        int workspace_size = 1 << 10)
       : parameters_(parameters), scope_(scope) {
     // create engine.
-    engine_.reset(new TensorRTEngine(10, 1 << 10, &stream_));
+    engine_.reset(new TensorRTEngine(batch_size, workspace_size, &stream_));
     engine_->InitNetwork();
 
     PADDLE_ENFORCE_EQ(cudaStreamCreate(&stream_), 0);
@@ -138,12 +139,11 @@ class TRTConvertValidation {
     cudaStreamSynchronize(*engine_->stream());
 
     ASSERT_FALSE(op_desc_->OutputArgumentNames().empty());
-    const size_t output_space_size = 200;
+    const size_t output_space_size = 2000;
     for (const auto& output : op_desc_->OutputArgumentNames()) {
       std::vector<float> fluid_out;
       std::vector<float> trt_out(output_space_size);
-      engine_->GetOutputInCPU(output, &trt_out[0],
-                              output_space_size * sizeof(float));
+      engine_->GetOutputInCPU(output, &trt_out[0], output_space_size);
       cudaStreamSynchronize(*engine_->stream());
 
       auto* var = scope_.FindVar(output);
diff --git a/paddle/fluid/inference/tensorrt/engine.cc b/paddle/fluid/inference/tensorrt/engine.cc
index fefec0df6d03669a294ce9643b666d7416593708..b821c3d0bf425c46fae634fbf53f7ee63100ca5c 100644
--- a/paddle/fluid/inference/tensorrt/engine.cc
+++ b/paddle/fluid/inference/tensorrt/engine.cc
@@ -1,7 +1,7 @@
 /* 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.
+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
@@ -26,6 +26,8 @@ namespace paddle {
 namespace inference {
 namespace tensorrt {
 
+int TensorRTEngine::runtime_batch_ = 1;
+
 void TensorRTEngine::Build(const DescType &paddle_model) {
   PADDLE_ENFORCE(false, "not implemented");
 }
@@ -42,6 +44,7 @@ void TensorRTEngine::Execute(int batch_size) {
   PADDLE_ENFORCE_NOT_NULL(stream_);
   infer_context_->enqueue(batch_size, buffers.data(), *stream_, nullptr);
   cudaStreamSynchronize(*stream_);
+  SetRuntimeBatch(batch_size);
 }
 
 TensorRTEngine::~TensorRTEngine() {
@@ -80,17 +83,17 @@ void TensorRTEngine::FreezeNetwork() {
       auto dims = infer_engine_->getBindingDimensions(slot_offset);
       item.second = kDataTypeSize[static_cast<int>(
                         infer_engine_->getBindingDataType(slot_offset))] *
-                    analysis::AccuDims(dims.d, dims.nbDims);
+                    analysis::AccuDims(dims.d, dims.nbDims) * max_batch_;
       PADDLE_ENFORCE_GT(item.second, 0);
     }
 
     auto &buf = buffer(item.first);
     buf.max_size = item.second * max_batch_;
     CHECK(buf.buffer == nullptr);  // buffer should be allocated only once.
-    PADDLE_ENFORCE_EQ(0, cudaMalloc(&buf.buffer, buf.max_size));
-    PADDLE_ENFORCE_LE(buf.max_size, 1 << 30);  // 10G
-    // buf.size will changed in the runtime.
+
+    PADDLE_ENFORCE_EQ(0, cudaMalloc(&buf.buffer, item.second * max_batch_));
     buf.size = 0;
+    PADDLE_ENFORCE_LE(buf.max_size, 1 << 30);  // 10G
     buf.device = DeviceType::GPU;
   }
 }
@@ -105,7 +108,7 @@ nvinfer1::ITensor *TensorRTEngine::DeclareInput(const std::string &name,
   auto *input = infer_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);
+                        analysis::AccuDims(dims.d, dims.nbDims) * max_batch_;
   PADDLE_ENFORCE(input->isNetworkInput());
   TensorRTEngine::SetITensor(name, input);
   return input;
@@ -149,35 +152,42 @@ void *TensorRTEngine::GetOutputInGPU(const std::string &name) {
 void TensorRTEngine::GetOutputInGPU(const std::string &name, void *dst,
                                     size_t max_size) {
   // determine data size
+  auto *output = TensorRTEngine::GetITensor(name);
+  nvinfer1::Dims dims = output->getDimensions();
+  auto dim_size = analysis::AccuDims(dims.d, dims.nbDims);
+  size_t dst_size = dim_size * runtime_batch_ *
+                    kDataTypeSize[static_cast<int>(output->getType())];
+
   auto it = buffer_sizes_.find(name);
   PADDLE_ENFORCE(it != buffer_sizes_.end());
   PADDLE_ENFORCE_GT(it->second, 0);
-  PADDLE_ENFORCE_GE(max_size, it->second);
+  PADDLE_ENFORCE_LE(dst_size, it->second);
+  PADDLE_ENFORCE_GE(max_size, dst_size);
   auto &buf = buffer(name);
   PADDLE_ENFORCE_NOT_NULL(buf.buffer, "buffer should be allocated before");
-  PADDLE_ENFORCE_EQ(cudaMemcpyAsync(dst, buf.buffer, it->second,
+  PADDLE_ENFORCE_EQ(cudaMemcpyAsync(dst, buf.buffer, dst_size,
                                     cudaMemcpyDeviceToDevice, *stream_),
                     0);
 }
 
 void TensorRTEngine::GetOutputInCPU(const std::string &name, void *dst,
                                     size_t max_size) {
-  VLOG(4) << "get output in cpu";
-  auto &buf = buffer(name);
-
-  // Update needed buffer size.
-  auto slot_offset = infer_engine_->getBindingIndex(name.c_str());
-  auto dims = infer_engine_->getBindingDimensions(slot_offset);
-  buf.size = kDataTypeSize[static_cast<int>(
-                 infer_engine_->getBindingDataType(slot_offset))] *
-             analysis::AccuDims(dims.d, dims.nbDims);
-  PADDLE_ENFORCE_LE(buf.size, buf.max_size);
   // determine data size
+
+  auto *output = TensorRTEngine::GetITensor(name);
+  nvinfer1::Dims dims = output->getDimensions();
+  auto dim_size = analysis::AccuDims(dims.d, dims.nbDims);
+  size_t dst_size = dim_size * runtime_batch_ *
+                    kDataTypeSize[static_cast<int>(output->getType())];
+  auto it = buffer_sizes_.find(name);
+  PADDLE_ENFORCE(it != buffer_sizes_.end());
+  PADDLE_ENFORCE_GT(it->second, 0);
+  PADDLE_ENFORCE_LE(dst_size, it->second);
+  PADDLE_ENFORCE_GE(max_size, dst_size);
+  auto &buf = buffer(name);
   PADDLE_ENFORCE_NOT_NULL(buf.buffer, "buffer should be allocated before");
-  // DEBUG
-  memset(dst, 0, buf.size);
-  PADDLE_ENFORCE_EQ(
-      0, cudaMemcpy(dst, buf.buffer, buf.size, cudaMemcpyDeviceToHost));
+  PADDLE_ENFORCE_EQ(0, cudaMemcpyAsync(dst, buf.buffer, dst_size,
+                                       cudaMemcpyDeviceToHost, *stream_));
 }
 
 Buffer &TensorRTEngine::buffer(const std::string &name) {
@@ -225,6 +235,12 @@ nvinfer1::ITensor *TensorRTEngine::GetITensor(const std::string &name) {
   return itensor_map_[name];
 }
 
+void TensorRTEngine::SetRuntimeBatch(size_t batch_size) {
+  runtime_batch_ = batch_size;
+}
+
+int TensorRTEngine::GetRuntimeBatch() { return runtime_batch_; }
+
 }  // namespace tensorrt
 }  // namespace inference
 }  // namespace paddle
diff --git a/paddle/fluid/inference/tensorrt/engine.h b/paddle/fluid/inference/tensorrt/engine.h
index 7064d333f6db754f88c0ac6956a9527a48bf866c..694468c419c20089de1cdecff1a903ad0cc6e99f 100644
--- a/paddle/fluid/inference/tensorrt/engine.h
+++ b/paddle/fluid/inference/tensorrt/engine.h
@@ -117,10 +117,14 @@ class TensorRTEngine : public EngineBase {
 
   nvinfer1::ICudaEngine* engine() { return infer_engine_.get(); }
   nvinfer1::INetworkDefinition* network() { return infer_network_.get(); }
+  void SetRuntimeBatch(size_t batch_size);
+  int GetRuntimeBatch();
 
  private:
   // the max batch size
   int max_batch_;
+  // the runtime batch size
+  static int runtime_batch_;
   // the max memory size the engine uses
   int max_workspace_;
 
diff --git a/paddle/fluid/inference/tensorrt/test_engine.cc b/paddle/fluid/inference/tensorrt/test_engine.cc
index fca3488008ed83418b5e28b8af42d8019aaaa2a4..f8732e51b66bdc78aa35d06ba9651f1942a74b01 100644
--- a/paddle/fluid/inference/tensorrt/test_engine.cc
+++ b/paddle/fluid/inference/tensorrt/test_engine.cc
@@ -28,7 +28,7 @@ class TensorRTEngineTest : public ::testing::Test {
  protected:
   void SetUp() override {
     ASSERT_EQ(0, cudaStreamCreate(&stream_));
-    engine_ = new TensorRTEngine(1, 1 << 10, &stream_);
+    engine_ = new TensorRTEngine(10, 1 << 10, &stream_);
     engine_->InitNetwork();
   }
 
@@ -71,7 +71,7 @@ TEST_F(TensorRTEngineTest, add_layer) {
 
   LOG(INFO) << "to get output";
   float y_cpu;
-  engine_->GetOutputInCPU("y", &y_cpu, sizeof(float));
+  engine_->GetOutputInCPU("y", &y_cpu, 1 * sizeof(float));
 
   LOG(INFO) << "to checkout output";
   ASSERT_EQ(y_cpu, x_v * 2 + 3);
@@ -103,15 +103,49 @@ TEST_F(TensorRTEngineTest, add_layer_multi_dim) {
 
   LOG(INFO) << "to get output";
   float y_cpu[2] = {-1., -1.};
+
   auto dims = engine_->GetITensor("y")->getDimensions();
   ASSERT_EQ(dims.nbDims, 3);
   ASSERT_EQ(dims.d[0], 2);
   ASSERT_EQ(dims.d[1], 1);
-  engine_->GetOutputInCPU("y", &y_cpu[0], sizeof(float) * 2);
+  engine_->GetOutputInCPU("y", &y_cpu[0], 2 * sizeof(float));
   ASSERT_EQ(y_cpu[0], 4.5);
   ASSERT_EQ(y_cpu[1], 14.5);
 }
 
+TEST_F(TensorRTEngineTest, test_conv2d_temp) {
+  // Weight in CPU memory.
+  float raw_weight[9] = {1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0};
+  float raw_bias[1] = {0};
+
+  TensorRTEngine::Weight weight(nvinfer1::DataType::kFLOAT, raw_weight, 9);
+  TensorRTEngine::Weight bias(nvinfer1::DataType::kFLOAT, raw_bias, 1);
+  auto* x = engine_->DeclareInput("x", nvinfer1::DataType::kFLOAT,
+                                  nvinfer1::Dims3{1, 3, 3});
+  auto* conv_layer =
+      TRT_ENGINE_ADD_LAYER(engine_, Convolution, *x, 1, nvinfer1::DimsHW{3, 3},
+                           weight.get(), bias.get());
+  PADDLE_ENFORCE(conv_layer != nullptr);
+  conv_layer->setStride(nvinfer1::DimsHW{1, 1});
+  conv_layer->setPadding(nvinfer1::DimsHW{1, 1});
+
+  engine_->DeclareOutput(conv_layer, 0, "y");
+  engine_->FreezeNetwork();
+  ASSERT_EQ(engine_->engine()->getNbBindings(), 2);
+
+  float x_v[18] = {1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
+                   1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0};
+  engine_->SetInputFromCPU("x", reinterpret_cast<void*>(&x_v),
+                           18 * sizeof(float));
+  engine_->Execute(2);
+
+  LOG(INFO) << "to get output";
+  float* y_cpu = new float[18];
+  engine_->GetOutputInCPU("y", &y_cpu[0], 18 * sizeof(float));
+  ASSERT_EQ(y_cpu[0], 4.0);
+  ASSERT_EQ(y_cpu[1], 6.0);
+}
+
 }  // namespace tensorrt
 }  // namespace inference
 }  // namespace paddle
diff --git a/paddle/fluid/operators/tensorrt_engine_op.cc b/paddle/fluid/operators/tensorrt_engine_op.cc
index 43672d6db92a981f0fbe6e8f7079dafc6ae4052e..db641a4bc2c637e0babee6b6bc6e67b068759ff5 100644
--- a/paddle/fluid/operators/tensorrt_engine_op.cc
+++ b/paddle/fluid/operators/tensorrt_engine_op.cc
@@ -55,13 +55,14 @@ nvinfer1::Dims Vec2TRT_Dims(const std::vector<int64_t> &shape) {
                     "TensorRT' tensor input requires at least 2 dimensions");
   PADDLE_ENFORCE_LE(shape.size(), 4UL,
                     "TensorRT' tensor input requires at most 4 dimensions");
+
   switch (shape.size()) {
     case 2:
-      return nvinfer1::Dims2(shape[0], shape[1]);
+      return nvinfer1::Dims2(1, shape[1]);
     case 3:
-      return nvinfer1::Dims3(shape[0], shape[1], shape[2]);
+      return nvinfer1::Dims3(1, shape[1], shape[2]);
     case 4:
-      return nvinfer1::Dims4(shape[0], shape[1], shape[2], shape[3]);
+      return nvinfer1::Dims4(1, shape[1], shape[2], shape[3]);
     default:
       return nvinfer1::Dims();
   }
diff --git a/paddle/fluid/operators/tensorrt_engine_op.h b/paddle/fluid/operators/tensorrt_engine_op.h
index a332d70030ffa6a033f6b2b33487a4fd279b7016..32d10fd8a5687ebaae1d7d75af531cbc45ef4245 100644
--- a/paddle/fluid/operators/tensorrt_engine_op.h
+++ b/paddle/fluid/operators/tensorrt_engine_op.h
@@ -93,13 +93,15 @@ class TensorRTEngineKernel : public framework::OpKernel<T> {
       auto* fluid_v = context.scope().FindVar(y);
       PADDLE_ENFORCE_NOT_NULL(fluid_v, "no output variable called %s", y);
       auto* fluid_t = fluid_v->GetMutable<framework::LoDTensor>();
-      auto size = inference::analysis::AccuDims(dims.d, dims.nbDims);
+
       fluid_t->Resize(framework::make_ddim(ddim));
 
       // TODO(Superjomn) find some way to determine which device to output the
       // tensor.
       // if (platform::is_cpu_place(fluid_t->place())) {
       // TODO(Superjomn) change this float to dtype size.
+      auto size = inference::analysis::AccuDims(dims.d, dims.nbDims) *
+                  FLAGS_tensorrt_engine_batch_size;
       engine->GetOutputInCPU(y,
                              fluid_t->mutable_data<float>(platform::CPUPlace()),
                              size * sizeof(float));
diff --git a/paddle/fluid/operators/tensorrt_engine_op_test.cc b/paddle/fluid/operators/tensorrt_engine_op_test.cc
index 82a16361e40513aeaf6f510e450f58989369fcdb..7cb1e47a1516c32fb31a7818e7203b498e31e431 100644
--- a/paddle/fluid/operators/tensorrt_engine_op_test.cc
+++ b/paddle/fluid/operators/tensorrt_engine_op_test.cc
@@ -64,36 +64,37 @@ TEST(TensorRTEngineOp, manual) {
 
   LOG(INFO) << "create block desc";
   framework::BlockDesc block_desc(&program, block_);
-  LOG(INFO) << "create mul op";
-  auto* mul = block_desc.AppendOp();
-  mul->SetType("mul");
-  mul->SetInput("X", std::vector<std::string>({"x"}));     // 2 x 4
-  mul->SetInput("Y", std::vector<std::string>({"y"}));     // 4 x 6
-  mul->SetOutput("Out", std::vector<std::string>({"z"}));  // 2 x 6
+  LOG(INFO) << "create fc op";
+  auto* fc0 = block_desc.AppendOp();
+  fc0->SetType("fc");
+  fc0->SetInput("X", std::vector<std::string>({"x"}));     // 4 x 1 x 1
+  fc0->SetInput("Y", std::vector<std::string>({"y"}));     // 4 x 6
+  fc0->SetOutput("Out", std::vector<std::string>({"z"}));  // 6 x 1 x 1
 
   LOG(INFO) << "create fc op";
-  auto* fc = block_desc.AppendOp();
-  fc->SetType("mul");
-  fc->SetInput("X", std::vector<std::string>({"z"}));
-  fc->SetInput("Y", std::vector<std::string>({"y0"}));     // 6 x 8
-  fc->SetOutput("Out", std::vector<std::string>({"z0"}));  // 2 x 8
+  auto* fc1 = block_desc.AppendOp();
+  fc1->SetType("fc");
+  fc1->SetInput("X", std::vector<std::string>({"z"}));
+  fc1->SetInput("Y", std::vector<std::string>({"y0"}));     // 6 x 8
+  fc1->SetOutput("Out", std::vector<std::string>({"z0"}));  // 8 x 1 x 1
 
   // Set inputs' variable shape in BlockDesc
-  AddTensorToBlockDesc(block_, "x", std::vector<int64_t>({2, 4}));
+  // the batch size is 2, so the dims of 'x' is {2, 4, 1, 1}
+  AddTensorToBlockDesc(block_, "x", std::vector<int64_t>({2, 4, 1, 1}));
   AddTensorToBlockDesc(block_, "y", std::vector<int64_t>({4, 6}));
   AddTensorToBlockDesc(block_, "y0", std::vector<int64_t>({6, 8}));
   AddTensorToBlockDesc(block_, "z", std::vector<int64_t>({2, 6}));
 
   // It is wired, need to copy manually.
-  *block_->add_ops() = *mul->Proto();
-  *block_->add_ops() = *fc->Proto();
+  *block_->add_ops() = *fc0->Proto();
+  *block_->add_ops() = *fc1->Proto();
 
   ASSERT_EQ(block_->ops_size(), 2);
 
   LOG(INFO) << "create tensorrt desc";
   framework::OpDesc engine_op_desc(nullptr);
   engine_op_desc.SetType("tensorrt_engine");
-  engine_op_desc.SetInput("Xs", std::vector<std::string>({"x", "y", "y0"}));
+  engine_op_desc.SetInput("Xs", std::vector<std::string>({"x"}));
   engine_op_desc.SetOutput("Ys", std::vector<std::string>({"z0"}));
   SetAttr<std::string>(engine_op_desc.Proto(), "subgraph",
                        block_->SerializeAsString());
@@ -207,5 +208,4 @@ TEST(TensorRTEngineOp, fc) { Execute(40, 28, 28); }
 }  // namespace operators
 }  // namespace paddle
 
-USE_TRT_CONVERTER(mul)
 USE_TRT_CONVERTER(fc)
diff --git a/python/paddle/fluid/layers/control_flow.py b/python/paddle/fluid/layers/control_flow.py
index 79a11a30d602cb33c2583873e0d0f2e15e0fcb8c..f05ae6d5d1900560e37370121bf64f1fcab14357 100644
--- a/python/paddle/fluid/layers/control_flow.py
+++ b/python/paddle/fluid/layers/control_flow.py
@@ -23,25 +23,17 @@ from ops import logical_and, logical_not, logical_or
 import numpy
 
 __all__ = [
-    'split_lod_tensor',
-    'merge_lod_tensor',
     'While',
     'Switch',
-    'lod_rank_table',
-    'max_sequence_len',
-    'lod_tensor_to_array',
-    'array_to_lod_tensor',
     'increment',
     'array_write',
     'create_array',
     'less_than',
     'equal',
     'array_read',
-    'shrink_memory',
     'array_length',
     'IfElse',
     'DynamicRNN',
-    'ConditionalBlock',
     'StaticRNN',
     'reorder_lod_tensor_by_rank',
     'ParallelDo',
@@ -1457,7 +1449,7 @@ class IfElse(object):
         if self.status == IfElse.OUT_IF_ELSE_BLOCKS:
             raise ValueError("input must in true/false blocks")
         if id(x) not in self.input_table:
-            parent_block = self.parent_block()
+            parent_block = self._parent_block()
             out_true = parent_block.create_var(
                 name=unique_name.generate('ifelse_input' + self.helper.name),
                 dtype=x.dtype)
@@ -1483,7 +1475,7 @@ class IfElse(object):
         else:
             return out_false
 
-    def parent_block(self):
+    def _parent_block(self):
         current_block = self.helper.main_program.current_block()
         return self.helper.main_program.block(current_block.parent_idx)
 
@@ -1499,7 +1491,7 @@ class IfElse(object):
 
         out_table = self.output_table[1 if self.status ==
                                       self.IN_IF_ELSE_TRUE_BLOCKS else 0]
-        parent_block = self.parent_block()
+        parent_block = self._parent_block()
         for each_out in outs:
             if not isinstance(each_out, Variable):
                 raise TypeError("Each output should be a variable")
diff --git a/python/paddle/fluid/tests/test_if_else_op.py b/python/paddle/fluid/tests/test_if_else_op.py
index 1b58925599de62510ea9048f5210bb0b7e49f933..799c31dfe5161ff6aef47601f1b6f6e38885760b 100644
--- a/python/paddle/fluid/tests/test_if_else_op.py
+++ b/python/paddle/fluid/tests/test_if_else_op.py
@@ -19,6 +19,10 @@ from paddle.fluid.executor import Executor
 from paddle.fluid.optimizer import MomentumOptimizer
 import paddle.fluid.core as core
 import paddle.fluid as fluid
+from paddle.fluid.layers.control_flow import split_lod_tensor
+from paddle.fluid.layers.control_flow import merge_lod_tensor
+from paddle.fluid.layers.control_flow import ConditionalBlock
+
 import unittest
 import numpy as np
 
@@ -34,11 +38,10 @@ class TestMNISTIfElseOp(unittest.TestCase):
 
             limit = layers.fill_constant(shape=[1], dtype='int64', value=5)
             cond = layers.less_than(x=label, y=limit)
-            true_image, false_image = layers.split_lod_tensor(
-                input=image, mask=cond)
+            true_image, false_image = split_lod_tensor(input=image, mask=cond)
 
             true_out = layers.create_tensor(dtype='float32')
-            true_cond = layers.ConditionalBlock([cond])
+            true_cond = ConditionalBlock([cond])
 
             with true_cond.block():
                 hidden = layers.fc(input=true_image, size=100, act='tanh')
@@ -46,14 +49,14 @@ class TestMNISTIfElseOp(unittest.TestCase):
                 layers.assign(input=prob, output=true_out)
 
             false_out = layers.create_tensor(dtype='float32')
-            false_cond = layers.ConditionalBlock([cond])
+            false_cond = ConditionalBlock([cond])
 
             with false_cond.block():
                 hidden = layers.fc(input=false_image, size=200, act='tanh')
                 prob = layers.fc(input=hidden, size=10, act='softmax')
                 layers.assign(input=prob, output=false_out)
 
-            prob = layers.merge_lod_tensor(
+            prob = merge_lod_tensor(
                 in_true=true_out, in_false=false_out, mask=cond, x=image)
             loss = layers.cross_entropy(input=prob, label=label)
             avg_loss = layers.mean(loss)
diff --git a/python/paddle/fluid/tests/unittests/test_conditional_block.py b/python/paddle/fluid/tests/unittests/test_conditional_block.py
index 084b8d37386fac0366c190f5f30dd39467072498..d9f83905e6135e22f74e749857f9b0fbe464d3f4 100644
--- a/python/paddle/fluid/tests/unittests/test_conditional_block.py
+++ b/python/paddle/fluid/tests/unittests/test_conditional_block.py
@@ -18,14 +18,15 @@ import paddle.fluid.core as core
 from paddle.fluid.framework import default_startup_program, default_main_program
 from paddle.fluid.executor import Executor
 from paddle.fluid.backward import append_backward
+from paddle.fluid.layers.control_flow import ConditionalBlock
 import numpy
 
 
-class ConditionalBlock(unittest.TestCase):
+class ConditionalBlockTest(unittest.TestCase):
     def test_forward(self):
         data = layers.data(name='X', shape=[1], dtype='float32')
         data.stop_gradient = False
-        cond = layers.ConditionalBlock(inputs=[data])
+        cond = ConditionalBlock(inputs=[data])
         out = layers.create_tensor(dtype='float32')
         with cond.block():
             hidden = layers.fc(input=data, size=10)
diff --git a/python/paddle/fluid/tests/unittests/test_const_value.py b/python/paddle/fluid/tests/unittests/test_const_value.py
index d1075d514e9b2b692f271f10a005815a66b421fb..58ac6fa0a9a30a08a831111513777cca59062724 100644
--- a/python/paddle/fluid/tests/unittests/test_const_value.py
+++ b/python/paddle/fluid/tests/unittests/test_const_value.py
@@ -16,7 +16,7 @@ import unittest
 import paddle.fluid.framework as framework
 
 
-class ConditionalBlock(unittest.TestCase):
+class ConstantTest(unittest.TestCase):
     def test_const_value(self):
         self.assertEqual(framework.GRAD_VAR_SUFFIX, "@GRAD")
         self.assertEqual(framework.TEMP_VAR_NAME, "@TEMP@")
diff --git a/python/paddle/fluid/tests/unittests/test_dyn_rnn.py b/python/paddle/fluid/tests/unittests/test_dyn_rnn.py
index 0faed94deb4808783027d776e0f4c61da0db457a..4448de8839d7ad4ad1f70ecdc4ac94da1e619adb 100644
--- a/python/paddle/fluid/tests/unittests/test_dyn_rnn.py
+++ b/python/paddle/fluid/tests/unittests/test_dyn_rnn.py
@@ -17,6 +17,12 @@ import paddle
 import unittest
 import numpy
 
+from paddle.fluid.layers.control_flow import lod_rank_table
+from paddle.fluid.layers.control_flow import max_sequence_len
+from paddle.fluid.layers.control_flow import lod_tensor_to_array
+from paddle.fluid.layers.control_flow import array_to_lod_tensor
+from paddle.fluid.layers.control_flow import shrink_memory
+
 
 class TestDynRNN(unittest.TestCase):
     def setUp(self):
@@ -38,12 +44,11 @@ class TestDynRNN(unittest.TestCase):
 
             label = fluid.layers.data(name='label', shape=[1], dtype='float32')
 
-            rank_table = fluid.layers.lod_rank_table(x=sent_emb)
+            rank_table = lod_rank_table(x=sent_emb)
 
-            sent_emb_array = fluid.layers.lod_tensor_to_array(
-                x=sent_emb, table=rank_table)
+            sent_emb_array = lod_tensor_to_array(x=sent_emb, table=rank_table)
 
-            seq_len = fluid.layers.max_sequence_len(rank_table=rank_table)
+            seq_len = max_sequence_len(rank_table=rank_table)
             i = fluid.layers.fill_constant(shape=[1], dtype='int64', value=0)
             i.stop_gradient = False
 
@@ -66,7 +71,7 @@ class TestDynRNN(unittest.TestCase):
                 mem = fluid.layers.array_read(array=mem_array, i=i)
                 ipt = fluid.layers.array_read(array=sent_emb_array, i=i)
 
-                mem = fluid.layers.shrink_memory(x=mem, i=i, table=rank_table)
+                mem = shrink_memory(x=mem, i=i, table=rank_table)
 
                 hidden = fluid.layers.fc(input=[mem, ipt], size=100, act='tanh')
 
@@ -75,8 +80,7 @@ class TestDynRNN(unittest.TestCase):
                 fluid.layers.array_write(x=hidden, i=i, array=mem_array)
                 fluid.layers.less_than(x=i, y=seq_len, cond=cond)
 
-            all_timesteps = fluid.layers.array_to_lod_tensor(
-                x=out, table=rank_table)
+            all_timesteps = array_to_lod_tensor(x=out, table=rank_table)
             last = fluid.layers.sequence_last_step(input=all_timesteps)
             logits = fluid.layers.fc(input=last, size=1, act=None)
             loss = fluid.layers.sigmoid_cross_entropy_with_logits(
diff --git a/python/paddle/fluid/tests/unittests/test_lod_rank_table.py b/python/paddle/fluid/tests/unittests/test_lod_rank_table.py
index bac5e502318397b43e9867d5fc9e4e8cd33394b8..16e85830ffa51ec428951570cc7a038f3d10c873 100644
--- a/python/paddle/fluid/tests/unittests/test_lod_rank_table.py
+++ b/python/paddle/fluid/tests/unittests/test_lod_rank_table.py
@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from paddle.fluid.layers import lod_rank_table, data
+from paddle.fluid.layers import data
+from paddle.fluid.layers.control_flow import lod_rank_table
 from paddle.fluid.executor import Executor
 import paddle.fluid.core as core
 import numpy
diff --git a/python/paddle/fluid/tests/unittests/test_lod_tensor_array_ops.py b/python/paddle/fluid/tests/unittests/test_lod_tensor_array_ops.py
index cebe6997bb4152519dabbabfc0404d6036bc4e65..5a4580116bc7009c73f1de14a265bf2cea5acf9b 100644
--- a/python/paddle/fluid/tests/unittests/test_lod_tensor_array_ops.py
+++ b/python/paddle/fluid/tests/unittests/test_lod_tensor_array_ops.py
@@ -20,6 +20,11 @@ from paddle.fluid.framework import Program, program_guard
 from paddle.fluid.executor import Executor
 from paddle.fluid.backward import append_backward
 
+from paddle.fluid.layers.control_flow import lod_rank_table
+from paddle.fluid.layers.control_flow import max_sequence_len
+from paddle.fluid.layers.control_flow import lod_tensor_to_array
+from paddle.fluid.layers.control_flow import array_to_lod_tensor
+
 
 class TestCPULoDTensorArrayOps(unittest.TestCase):
     def place(self):
@@ -137,13 +142,13 @@ class TestCPULoDTensorArrayOps(unittest.TestCase):
         with program_guard(program):
             x = layers.data(name='x', shape=[10])
             x.persistable = True
-            table = layers.lod_rank_table(x, level=level)
-            max_len = layers.max_sequence_len(table)
+            table = lod_rank_table(x, level=level)
+            max_len = max_sequence_len(table)
             max_len.persistable = True
-            array = layers.lod_tensor_to_array(x, table)
+            array = lod_tensor_to_array(x, table)
             array.persistable = True
 
-            result = layers.array_to_lod_tensor(array, table)
+            result = array_to_lod_tensor(array, table)
             result.persistable = True
         exe = Executor(place)
         scope = core.Scope()
@@ -181,9 +186,9 @@ class TestCPULoDTensorArrayOpGrad(unittest.TestCase):
         with program_guard(program):
             x = layers.data(
                 name='x', shape=[1], dtype='float32', stop_gradient=False)
-            table = layers.lod_rank_table(x, level=0)
-            array = layers.lod_tensor_to_array(x, table)
-            result = layers.array_to_lod_tensor(array, table)
+            table = lod_rank_table(x, level=0)
+            array = lod_tensor_to_array(x, table)
+            result = array_to_lod_tensor(array, table)
 
             mean = layers.mean(result)
 
diff --git a/python/paddle/fluid/tests/unittests/test_reorder_lod_tensor.py b/python/paddle/fluid/tests/unittests/test_reorder_lod_tensor.py
index a70321bd800bf25eeb9e5d197ea7e08626b9aede..6e1cd56b3e309fc014dc981a1e3aa841159fca15 100644
--- a/python/paddle/fluid/tests/unittests/test_reorder_lod_tensor.py
+++ b/python/paddle/fluid/tests/unittests/test_reorder_lod_tensor.py
@@ -15,6 +15,7 @@
 import unittest
 import paddle.fluid as fluid
 import paddle.fluid.core as core
+from paddle.fluid.layers.control_flow import lod_rank_table
 import numpy
 
 
@@ -34,7 +35,7 @@ class TestReorderLoDTensor(unittest.TestCase):
         dat.stop_gradient = False
         rank_dat = fluid.layers.data(
             name=cls.data_desc[1][0], shape=cls.data_desc[1][1])
-        table = fluid.layers.lod_rank_table(rank_dat)
+        table = lod_rank_table(rank_dat)
         new_dat = fluid.layers.reorder_lod_tensor_by_rank(
             x=dat, rank_table=table)
         loss = fluid.layers.reduce_sum(new_dat)
diff --git a/python/paddle/fluid/tests/unittests/test_shrink_rnn_memory.py b/python/paddle/fluid/tests/unittests/test_shrink_rnn_memory.py
index 24bc2cbaf86e8ed2c6a359c4c4d9a1e1507df746..6f0e337034d1010880514181654170316fd9db19 100644
--- a/python/paddle/fluid/tests/unittests/test_shrink_rnn_memory.py
+++ b/python/paddle/fluid/tests/unittests/test_shrink_rnn_memory.py
@@ -21,6 +21,9 @@ from paddle.fluid.framework import default_main_program, switch_main_program
 from paddle.fluid.framework import Program
 import numpy as np
 
+from paddle.fluid.layers.control_flow import shrink_memory
+from paddle.fluid.layers.control_flow import lod_rank_table
+
 
 class TestShrinkRNNMemoryBase(unittest.TestCase):
     def setUp(self):
@@ -30,15 +33,15 @@ class TestShrinkRNNMemoryBase(unittest.TestCase):
         x.stop_gradient = False
         rank_table_tensor = layers.data(
             'rank_table_tensor', shape=[1], dtype='float32', lod_level=1)
-        table = layers.lod_rank_table(x=rank_table_tensor)
+        table = lod_rank_table(x=rank_table_tensor)
         i = layers.zeros(dtype='int64', shape=[1])
-        self.mem1 = layers.shrink_memory(x=x, i=i, table=table)
+        self.mem1 = shrink_memory(x=x, i=i, table=table)
         i = layers.increment(x=i)
         i.stop_gradient = True
-        self.mem2 = layers.shrink_memory(x=self.mem1, i=i, table=table)
+        self.mem2 = shrink_memory(x=self.mem1, i=i, table=table)
         i = layers.increment(x=i)
         i.stop_gradient = True
-        self.mem3 = layers.shrink_memory(x=self.mem2, i=i, table=table)
+        self.mem3 = shrink_memory(x=self.mem2, i=i, table=table)
         mem3_mean = layers.mean(self.mem3)
         append_backward(loss=mem3_mean)
         self.x_grad = self.main_program.global_block().var('x@GRAD')
diff --git a/python/paddle/fluid/tests/unittests/test_split_and_merge_lod_tensor_op.py b/python/paddle/fluid/tests/unittests/test_split_and_merge_lod_tensor_op.py
index 0916ed7c9f1e2d6d90c6908983fdc8b177aecbb9..ea1146166d34a31efbd859318b411cea50895fe1 100644
--- a/python/paddle/fluid/tests/unittests/test_split_and_merge_lod_tensor_op.py
+++ b/python/paddle/fluid/tests/unittests/test_split_and_merge_lod_tensor_op.py
@@ -19,6 +19,8 @@ import paddle.fluid.layers as layers
 from paddle.fluid.framework import Program, program_guard
 from paddle.fluid.executor import Executor
 from paddle.fluid.backward import append_backward
+from paddle.fluid.layers.control_flow import split_lod_tensor
+from paddle.fluid.layers.control_flow import merge_lod_tensor
 
 
 class TestCPULoDTensorArrayOps(unittest.TestCase):
@@ -96,12 +98,11 @@ class TestCPULoDTensorArrayOps(unittest.TestCase):
             y = layers.data(name='y', shape=[1])
             y.persistable = True
 
-            out_true, out_false = layers.split_lod_tensor(
-                input=x, mask=y, level=level)
+            out_true, out_false = split_lod_tensor(input=x, mask=y, level=level)
             out_true.persistable = True
             out_false.persistable = True
 
-            out = layers.merge_lod_tensor(
+            out = merge_lod_tensor(
                 in_true=out_true, in_false=out_false, mask=y, x=x, level=level)
 
             out.persistable = True
@@ -142,9 +143,8 @@ class TestCPUSplitMergeLoDTensorGrad(unittest.TestCase):
 
             level = 0
 
-            out_true, out_false = layers.split_lod_tensor(
-                input=x, mask=y, level=level)
-            out = layers.merge_lod_tensor(
+            out_true, out_false = split_lod_tensor(input=x, mask=y, level=level)
+            out = merge_lod_tensor(
                 in_true=out_true, in_false=out_false, mask=y, x=x, level=level)
             mean = layers.mean(out)