diff --git a/mindspore/ccsrc/device/gpu/gpu_memory_manager.cc b/mindspore/ccsrc/device/gpu/gpu_memory_manager.cc
index 7d042264b6..8bb65963d8 100644
--- a/mindspore/ccsrc/device/gpu/gpu_memory_manager.cc
+++ b/mindspore/ccsrc/device/gpu/gpu_memory_manager.cc
@@ -1,5 +1,5 @@
 /**
- * Copyright 2019 Huawei Technologies Co., Ltd
+ * Copyright 2020 Huawei Technologies Co., Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/mindspore/ccsrc/device/gpu/gpu_stream_assign.cc b/mindspore/ccsrc/device/gpu/gpu_stream_assign.cc
index 39d5ca3fe6..08a19aa469 100644
--- a/mindspore/ccsrc/device/gpu/gpu_stream_assign.cc
+++ b/mindspore/ccsrc/device/gpu/gpu_stream_assign.cc
@@ -1,5 +1,5 @@
 /**
- * Copyright 2019 Huawei Technologies Co., Ltd
+ * Copyright 2020 Huawei Technologies Co., Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/mindspore/ccsrc/kernel/gpu/nn/dropout_gpu_kernel.cc b/mindspore/ccsrc/kernel/gpu/nn/dropout_gpu_kernel.cc
index eeec8365da..937f38137f 100644
--- a/mindspore/ccsrc/kernel/gpu/nn/dropout_gpu_kernel.cc
+++ b/mindspore/ccsrc/kernel/gpu/nn/dropout_gpu_kernel.cc
@@ -19,7 +19,6 @@
 
 namespace mindspore {
 namespace kernel {
-
 DropoutGpuFwdKernel::DropoutGpuFwdKernel()
     : cudnn_handle_(nullptr),
       is_null_input_(false),
diff --git a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.cc b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.cc
index a95c1b78dd..af95767407 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.cc
+++ b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.cc
@@ -18,7 +18,6 @@
 
 namespace mindspore {
 namespace kernel {
-
 MS_REG_GPU_KERNEL_ONE(BatchNormFold2,
                       KernelAttr()
                         .AddInputAttr(kNumberTypeFloat32)
diff --git a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.h b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.h
index 3e246f18f6..beeeb12a9a 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.h
+++ b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_gpu_kernel.h
@@ -132,7 +132,6 @@ class BatchNormFold2GpuKernel : public GpuKernel {
   std::vector<size_t> output_size_list_;
   std::vector<size_t> workspace_size_list_;
 };
-
 }  // namespace kernel
 }  // namespace mindspore
 
diff --git a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_grad_gpu_kernel.cc b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_grad_gpu_kernel.cc
index d5932f1984..93862aeedd 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_grad_gpu_kernel.cc
+++ b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold2_grad_gpu_kernel.cc
@@ -18,7 +18,6 @@
 
 namespace mindspore {
 namespace kernel {
-
 MS_REG_GPU_KERNEL_ONE(BatchNormFold2Grad,
                       KernelAttr()
                         .AddInputAttr(kNumberTypeFloat32)
diff --git a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold_gpu_kernel.cc b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold_gpu_kernel.cc
index b5fbfe4927..4f968a0fa3 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold_gpu_kernel.cc
+++ b/mindspore/ccsrc/kernel/gpu/quant/batchnorm_fold_gpu_kernel.cc
@@ -18,7 +18,6 @@
 
 namespace mindspore {
 namespace kernel {
-
 MS_REG_GPU_KERNEL_ONE(BatchNormFold,
                       KernelAttr()
                         .AddInputAttr(kNumberTypeFloat32)
diff --git a/mindspore/ccsrc/kernel/gpu/quant/correction_mul_gpu_kernel.h b/mindspore/ccsrc/kernel/gpu/quant/correction_mul_gpu_kernel.h
index 7608ae5d3c..eeab872ab3 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/correction_mul_gpu_kernel.h
+++ b/mindspore/ccsrc/kernel/gpu/quant/correction_mul_gpu_kernel.h
@@ -54,7 +54,6 @@ class CorrectionMulGpuKernel : public GpuKernel {
     }
 
     auto input_shape = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
-
     if (input_shape.size() != 4) {
       MS_LOG(ERROR) << "CorrectionMulGpuKernel input shape needs (N,C,H,W).";
       return false;
diff --git a/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.cc b/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.cc
index 211c515e02..28b5d56e68 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.cc
+++ b/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.cc
@@ -19,7 +19,6 @@
 
 namespace mindspore {
 namespace kernel {
-
 MS_REG_GPU_KERNEL_ONE(CorrectionMulGrad,
                       KernelAttr()
                         .AddInputAttr(kNumberTypeFloat32)
diff --git a/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.h b/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.h
index 2439826cc3..29aeb3be13 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.h
+++ b/mindspore/ccsrc/kernel/gpu/quant/correction_mul_grad_gpu_kernel.h
@@ -61,7 +61,6 @@ class CorrectionMulGradGpuKernel : public GpuKernel {
     }
 
     auto input_shape = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
-
     if (input_shape.size() != 4) {
       MS_LOG(ERROR) << "CorrectionMulGradGpuKernel input shape needs (N,C,H,W).";
       return false;
diff --git a/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.cc b/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.cc
index 302ef8d99f..1da9f457a1 100644
--- a/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.cc
+++ b/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.cc
@@ -114,6 +114,36 @@ void FakeQuantPerChannelGpuKernel::InitSizeLists() {
   workspace_size_list_.push_back(workspace_size_);
 }
 
+void FakeQuantPerChannelGpuKernel::CalFakeQuantizeForTraining(float *input, float *output, float *input_min,
+                                                              float *input_max, float *d_nudge_min, float *d_nudge_max,
+                                                              float *d_scale, uintptr_t stream_ptr) {
+  // calculate the input min and max according by the parameter ema and ema_decay.
+  CalMinMaxPerChannel(input, input_min, input_max, input_size_ / sizeof(float), channel_out_, ema_decay_, ema_,
+                      reinterpret_cast<cudaStream_t>(stream_ptr));
+  // control flow for quant_delay
+  if (global_step_ >= quant_delay_) {
+    // real launch
+    CalNudgePerChannel(input_min, input_max, quant_min_, quant_max_, d_nudge_min, d_nudge_max, d_scale, channel_out_,
+                       reinterpret_cast<cudaStream_t>(stream_ptr));
+    CalFakeQuantizePerChannel(input, output, input_size_ / sizeof(float), channel_out_, d_nudge_min, d_nudge_max,
+                              d_scale, symmetric_, reinterpret_cast<cudaStream_t>(stream_ptr));
+  } else {
+    CHECK_CUDA_RET_WITH_ERROR(cudaMemcpy(output, input, input_size_, cudaMemcpyDeviceToDevice),
+                              "Copy gpu memory failed.");
+  }
+  global_step_++;
+}
+
+void FakeQuantPerChannelGpuKernel::CalFakeQuantizeForInfer(float *input, float *output, float *input_min,
+                                                           float *input_max, float *d_nudge_min, float *d_nudge_max,
+                                                           float *d_scale, uintptr_t stream_ptr) {
+  // real launch
+  CalNudgePerChannel(input_min, input_max, quant_min_, quant_max_, d_nudge_min, d_nudge_max, d_scale, channel_out_,
+                     reinterpret_cast<cudaStream_t>(stream_ptr));
+  CalFakeQuantizePerChannel(input, output, input_size_ / sizeof(float), channel_out_, d_nudge_min, d_nudge_max, d_scale,
+                            symmetric_, reinterpret_cast<cudaStream_t>(stream_ptr));
+}
+
 bool FakeQuantPerChannelGpuKernel::Launch(const std::vector<AddressPtr> &inputs,
                                           const std::vector<AddressPtr> &workspace,
                                           const std::vector<AddressPtr> &outputs, uintptr_t stream_ptr) {
@@ -126,11 +156,8 @@ bool FakeQuantPerChannelGpuKernel::Launch(const std::vector<AddressPtr> &inputs,
   if (input == nullptr) {
     MS_LOG(EXCEPTION) << "FakeQuantPerChannelGpuKernel input is null.";
   }
-  if (input_min == nullptr) {
-    MS_LOG(EXCEPTION) << "FakeQuantPerChannelGpuKernel input min is null.";
-  }
-  if (input_max == nullptr) {
-    MS_LOG(EXCEPTION) << "FakeQuantPerChannelGpuKernel input max is null.";
+  if (input_min == nullptr || input_max == nullptr) {
+    MS_LOG(EXCEPTION) << "FakeQuantPerChannelGpuKernel input min or max is null.";
   }
 
   // Allocate space for device copies
@@ -143,30 +170,11 @@ bool FakeQuantPerChannelGpuKernel::Launch(const std::vector<AddressPtr> &inputs,
                             "Malloc gpu memory failed");
   CHECK_CUDA_RET_WITH_ERROR(cudaMalloc(reinterpret_cast<void **>(&d_nudge_max), sizeof(float) * channel_out_),
                             "Malloc gpu memory failed");
-  int total_size = input_size_ / sizeof(float);
-  bool symmetric = false;
+
   if (training_) {
-    // calculate the input min and max according by the parameter ema and ema_decay.
-    CalMinMaxPerChannel(input, input_min, input_max, total_size, channel_out_, ema_decay_, ema_,
-                        reinterpret_cast<cudaStream_t>(stream_ptr));
-    // control flow for quant_delay
-    if (global_step_ >= quant_delay_) {
-      // real launch
-      CalNudgePerChannel(input_min, input_max, quant_min_, quant_max_, d_nudge_min, d_nudge_max, d_scale, channel_out_,
-                         reinterpret_cast<cudaStream_t>(stream_ptr));
-      CalFakeQuantizePerChannel(input, output, total_size, channel_out_, d_nudge_min, d_nudge_max, d_scale, symmetric,
-                                reinterpret_cast<cudaStream_t>(stream_ptr));
-    } else {
-      CHECK_CUDA_RET_WITH_ERROR(cudaMemcpy(output, input, input_size_, cudaMemcpyDeviceToDevice),
-                                "Copy gpu memory failed.");
-    }
-    global_step_++;
+    CalFakeQuantizeForTraining(input, output, input_min, input_max, d_nudge_min, d_nudge_max, d_scale, stream_ptr);
   } else {
-    // real launch
-    CalNudgePerChannel(input_min, input_max, quant_min_, quant_max_, d_nudge_min, d_nudge_max, d_scale, channel_out_,
-                       reinterpret_cast<cudaStream_t>(stream_ptr));
-    CalFakeQuantizePerChannel(input, output, total_size, channel_out_, d_nudge_min, d_nudge_max, d_scale, symmetric,
-                              reinterpret_cast<cudaStream_t>(stream_ptr));
+    CalFakeQuantizeForInfer(input, output, input_min, input_max, d_nudge_min, d_nudge_max, d_scale, stream_ptr);
   }
 
   // Cleanup
diff --git a/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.h b/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.h
index faf8684fca..8a1bb7293a 100755
--- a/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.h
+++ b/mindspore/ccsrc/kernel/gpu/quant/fake_quant_per_channel_gpu_kernel.h
@@ -39,6 +39,11 @@ class FakeQuantPerChannelGpuKernel : public GpuKernel {
   void InitSizeLists() override;
 
  private:
+  void CalFakeQuantizeForTraining(float *input, float *output, float *input_min, float *input_max, float *d_nudge_min,
+                                  float *d_nudge_max, float *d_scale, uintptr_t stream_ptr);
+  void CalFakeQuantizeForInfer(float *input, float *output, float *input_min, float *input_max, float *d_nudge_min,
+                               float *d_nudge_max, float *d_scale, uintptr_t stream_ptr);
+
   size_t input_size_;
   size_t min_size_;
   size_t max_size_;