diff --git a/mindspore/lite/examples/quick_start_cpp/main.cc b/mindspore/lite/examples/quick_start_cpp/main.cc
index 449f427f992..820ba604918 100644
--- a/mindspore/lite/examples/quick_start_cpp/main.cc
+++ b/mindspore/lite/examples/quick_start_cpp/main.cc
@@ -25,7 +25,7 @@
 #include "include/lite_session.h"
 
 std::string RealPath(const char *path) {
-  size_t max = 4096;
+  const size_t max = 4096;
   if (path == nullptr) {
     std::cerr << "path is nullptr" << std::endl;
     return "";
diff --git a/mindspore/lite/examples/runtime_cpp/main.cc b/mindspore/lite/examples/runtime_cpp/main.cc
index 5bb35661521..f2cb1112628 100644
--- a/mindspore/lite/examples/runtime_cpp/main.cc
+++ b/mindspore/lite/examples/runtime_cpp/main.cc
@@ -27,7 +27,7 @@
 #include "include/version.h"
 
 std::string RealPath(const char *path) {
-  size_t max = 4096;
+  const size_t max = 4096;
   if (path == nullptr) {
     std::cerr << "path is nullptr" << std::endl;
     return "";
@@ -553,7 +553,6 @@ int RunWithSharedMemoryPool(const char *model_path) {
     return -1;
   }
   auto session1 = mindspore::session::LiteSession::CreateSession(context1.get());
-
   if (session1 == nullptr) {
     delete model;
     std::cerr << "CreateSession failed while running." << std::endl;
diff --git a/mindspore/lite/src/runtime/kernel/opencl/cl/strassen.cl b/mindspore/lite/src/runtime/kernel/opencl/cl/strassen.cl
index c3d6d8f3635..744dc480c0c 100644
--- a/mindspore/lite/src/runtime/kernel/opencl/cl/strassen.cl
+++ b/mindspore/lite/src/runtime/kernel/opencl/cl/strassen.cl
@@ -44,7 +44,7 @@ __kernel void MatMul_BUF_Add_Sub_2(__global FLT4 *input, __global FLT4 *output,
     return;
   }
   int ci_co_4 = shape.w;
-  int origin_shape = 2 * ci_co_4;
+  const int origin_shape = 2 * ci_co_4;
   int index_1 = (gidx + offset.x) * origin_shape + gidy + offset.y;
   int index_2 = (gidx + offset.z) * origin_shape + gidy + offset.w;
   FLT4 result1 = input[index_1];
@@ -121,7 +121,7 @@ __kernel void MatMul_BUF_Filled(__global FLT4 *input, __global FLT4 *output, int
   }
   int stride_out = shape.z * shape.w;
   int index_out = gidx * stride_out + gidy;
-  int stride_origin = 2 * stride_out;
+  const int stride_origin = 2 * stride_out;
   int index_in = (gidx + offset.x) * stride_origin + gidy + offset.y;
   FLT4 result = input[index_in];
   output[index_out] = result;
diff --git a/mindspore/lite/src/runtime/kernel/opencl/kernel/conv2d.cc b/mindspore/lite/src/runtime/kernel/opencl/kernel/conv2d.cc
index d149a0ad11c..93e4bc0faaa 100644
--- a/mindspore/lite/src/runtime/kernel/opencl/kernel/conv2d.cc
+++ b/mindspore/lite/src/runtime/kernel/opencl/kernel/conv2d.cc
@@ -500,7 +500,7 @@ kernel::LiteKernel *OpenCLConv2DCreator(const std::vector<lite::Tensor *> &input
   }
 
   // case 3: common conv2d
-  kernel::OpenCLKernel *kernel;
+  kernel::OpenCLKernel *kernel = nullptr;
   bool infer_shape_done = opParameter->infer_flag_;
   if (infer_shape_done && UseFcReplaceConv(inputs, outputs, conv_param)) {
     auto *fc_param = CreateFcParam(conv_param, inputs);
diff --git a/mindspore/lite/src/runtime/kernel/opencl/kernel/matmul.cc b/mindspore/lite/src/runtime/kernel/opencl/kernel/matmul.cc
index adf7684efb1..94f78de4708 100644
--- a/mindspore/lite/src/runtime/kernel/opencl/kernel/matmul.cc
+++ b/mindspore/lite/src/runtime/kernel/opencl/kernel/matmul.cc
@@ -226,7 +226,7 @@ int MatMulOpenCLKernel::Run() {
 kernel::LiteKernel *OpenCLMatMulKernelCreator(const std::vector<lite::Tensor *> &inputs,
                                               const std::vector<lite::Tensor *> &outputs, OpParameter *opParameter,
                                               const lite::InnerContext *ctx, const kernel::KernelKey &desc) {
-  kernel::OpenCLKernel *kernel;
+  kernel::OpenCLKernel *kernel = nullptr;
   bool infer_shape_done = opParameter->infer_flag_;
   if (infer_shape_done && IsUseStrassenMatmul(inputs)) {
     MS_LOG(DEBUG) << "use_matmul_strassen";