diff --git a/mindspore/ccsrc/backend/kernel_compiler/tbe/tbe_kernel_build.cc b/mindspore/ccsrc/backend/kernel_compiler/tbe/tbe_kernel_build.cc
index b99d1efae0e..cffd182e19e 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/tbe/tbe_kernel_build.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/tbe/tbe_kernel_build.cc
@@ -101,6 +101,7 @@ constexpr auto kSOC_VERSION = "SOC_VERSION";
 constexpr auto kJIsDynamicShape = "is_dynamic_shape";
 constexpr auto kJDynamicIndex = "dynamic_index";
 constexpr auto kJSocInfo = "SocInfo";
+constexpr auto kNCHWShapeSize = 4;
 
 const auto kPyPath = "/usr/local/Ascend/opp/op_impl/built-in/ai_core/tbe";
 
@@ -144,7 +145,7 @@ bool TbeKernelJsonCreator::GenTbeSingleKernelJson(const std::shared_ptr<mindspor
   op_info_json[kJOutputs] = outputs_json;
   // generate attrs json
   nlohmann::json attrs_json;
-  (void)GenTbeAttrJson(anf_node, op_info_ptr, &attrs_json);
+  GenTbeAttrJson(anf_node, op_info_ptr, &attrs_json);
   op_info_json[kJAttrs] = attrs_json;
   auto soc_version = TbeKernelJsonCreator::GetSocVersion();
   op_info_json[kJSocVersion] = soc_version;
@@ -959,7 +960,7 @@ void TbeKernelBuild::GenDescJson(const std::shared_ptr<mindspore::AnfNode> &anf_
   // !! Note: format: only data node's output use it
   auto format = AnfAlgo::GetOutputFormat(anf_node, node_out_idx);
   if (format == kOpFormat_DEFAULT) {
-    format = ori_shape.size() == 4 ? kOpFormat_NCHW : kOpFormat_ND;
+    format = ori_shape.size() == kNCHWShapeSize ? kOpFormat_NCHW : kOpFormat_ND;
   } else if (format == kOpFormat_FRAC_Z) {
     format = kOpFormat_FRACTAL_Z;
   }
@@ -1365,23 +1366,24 @@ bool TbeKernelBuild::CalOutputSize(const nlohmann::json &fusion_op_list,
     size_t real_idx = kernel_idx.second;
     auto full_name = real_node->fullname_with_scope();
     for (const auto &op : fusion_op_list) {
-      if (op[kJName] == full_name) {
-        auto op_output_desces = op[kJOutputDesc];
-        if (output_node != real_node) {
-          // tuple_get item
-          auto output_desc = op_output_desces[real_idx];
+      if (op[kJName] != full_name) {
+        continue;
+      }
+      auto op_output_desces = op[kJOutputDesc];
+      if (output_node != real_node) {
+        // tuple_get item
+        auto output_desc = op_output_desces[real_idx];
+        if (output_desc[kJShape].empty()) {
+          MS_LOG(INFO) << "Fusion error: output_desc's shape is empty. real_index " << real_idx;
+          return false;
+        }
+        output_size_list->push_back(GetIOSizeImpl(output_desc));
+      } else {
+        for (const auto &output_desc : op_output_desces) {
           if (output_desc[kJShape].empty()) {
-            MS_LOG(INFO) << "Fusion error: output_desc's shape is empty. real_index " << real_idx;
-            return false;
+            continue;
           }
           output_size_list->push_back(GetIOSizeImpl(output_desc));
-        } else {
-          for (const auto &output_desc : op_output_desces) {
-            if (output_desc[kJShape].empty()) {
-              continue;
-            }
-            output_size_list->push_back(GetIOSizeImpl(output_desc));
-          }
         }
       }
     }
diff --git a/mindspore/ccsrc/backend/optimizer/ascend/buffer_fusion/bnupdate_eltwise_fusion_pass.cc b/mindspore/ccsrc/backend/optimizer/ascend/buffer_fusion/bnupdate_eltwise_fusion_pass.cc
index 6db793dfd2e..5e5b7f4f9fa 100644
--- a/mindspore/ccsrc/backend/optimizer/ascend/buffer_fusion/bnupdate_eltwise_fusion_pass.cc
+++ b/mindspore/ccsrc/backend/optimizer/ascend/buffer_fusion/bnupdate_eltwise_fusion_pass.cc
@@ -27,6 +27,7 @@
 
 namespace mindspore {
 namespace opt {
+constexpr size_t INPUT2 = 2;
 void BnupdateEltwiseFusionPass::MatchBnupdateDoubleOutputEltwise(const CNodePtr &cnode, const AnfNodePtr &eltwise_input,
                                                                  const session::KernelGraph &kernel_graph,
                                                                  FusedNodeRecord *candidate_fusion) {
@@ -48,7 +49,7 @@ void BnupdateEltwiseFusionPass::MatchBnupdateDoubleOutputEltwise(const CNodePtr
       }
       auto out_getitem_ptr = out_getitem.first->cast<CNodePtr>();
       MS_EXCEPTION_IF_NULL(out_getitem_ptr);
-      auto input2 = out_getitem_ptr->input(2);
+      auto input2 = out_getitem_ptr->input(INPUT2);
       auto output_idx = GetValue<int64_t>(GetValueNode(input2));
       output_used_num[output_idx] = SizeToLong(manager->node_users()[out_getitem.first].size());
     }
diff --git a/mindspore/ccsrc/backend/optimizer/ascend/format_type/remove_internal_output.cc b/mindspore/ccsrc/backend/optimizer/ascend/format_type/remove_internal_output.cc
index fa677181acb..601341f4030 100644
--- a/mindspore/ccsrc/backend/optimizer/ascend/format_type/remove_internal_output.cc
+++ b/mindspore/ccsrc/backend/optimizer/ascend/format_type/remove_internal_output.cc
@@ -76,7 +76,7 @@ const AnfNodePtr RemoveInternalOutput::Process(const FuncGraphPtr &func_graph, c
   } else {
     auto tuple_getitem = input_node->cast<CNodePtr>();
     MS_EXCEPTION_IF_NULL(tuple_getitem);
-    int64_t idx = SizeToLong(AnfAlgo::GetTupleGetItemOutIndex(tuple_getitem));
+    size_t idx = AnfAlgo::GetTupleGetItemOutIndex(tuple_getitem);
     AnfNodePtr real_input_node = AnfAlgo::GetTupleGetItemRealInput(tuple_getitem);
     kernel_graph->ReplaceInternalOutput(node, real_input_node, 0, idx);
   }