diff --git a/mindspore/lite/examples/train_lenet/src/net_runner.cc b/mindspore/lite/examples/train_lenet/src/net_runner.cc
index 5e4dea836fc..50006373550 100644
--- a/mindspore/lite/examples/train_lenet/src/net_runner.cc
+++ b/mindspore/lite/examples/train_lenet/src/net_runner.cc
@@ -154,7 +154,6 @@ int NetRunner::InitDB() {
   TypeCast typecast(mindspore::DataType::kNumberTypeInt32);
   train_ds_ = train_ds_->Map({&typecast}, {"label"});
 
-  // train_ds_ = train_ds_->Shuffle(2);
   train_ds_ = train_ds_->Batch(batch_size_, true);
 
   if (verbose_) {
diff --git a/mindspore/lite/src/scheduler.cc b/mindspore/lite/src/scheduler.cc
index 41a9570e3a1..b7138052674 100644
--- a/mindspore/lite/src/scheduler.cc
+++ b/mindspore/lite/src/scheduler.cc
@@ -722,9 +722,6 @@ int Scheduler::ConstructSubGraphs(std::vector<kernel::LiteKernel *> src_kernel,
     if (head_kernel->subgraph_type() != kernel::kNotSubGraph) {
       (*is_kernel_finish)[head_kernel] = true;
       dst_kernel->push_back(head_kernel);
-
-      /* npu support split  */
-      /* ConstructSubGraphs(head_kernel->nodes(), dst_kernel, is_kernel_finish); */
       continue;
     }
     if (head_kernel->desc().arch == mindspore::kernel::kAPU) {
diff --git a/mindspore/lite/src/sub_graph_split.cc b/mindspore/lite/src/sub_graph_split.cc
index ee2fb84d95f..5ca7ab31336 100644
--- a/mindspore/lite/src/sub_graph_split.cc
+++ b/mindspore/lite/src/sub_graph_split.cc
@@ -45,7 +45,6 @@ void SearchSubGraph::ConvertSubGraphToModel() {
     if (subgraph.nodes_.empty()) {
       continue;
     }
-    //    DeviceType device = subgraph.device_;
 
     int new_sub_index = model_->sub_graphs_.size();
     int partial_index = model_->all_nodes_.size();
@@ -71,7 +70,6 @@ void SearchSubGraph::ConvertSubGraphToModel() {
       new_sub_graph->node_indices_.push_back(node_index);
       VectorErase(&main_graphs->node_indices_, node_index);
       VectorErase(&subgraph.nodes_, node_index);
-      //      model_->all_nodes_[node_index]->device_type_ = device;
     }
 
     for (uint32_t head_index : subgraph.heads_) {
@@ -227,13 +225,7 @@ void SearchSubGraph::InitSubgraphDevice() {
   }
 }
 
-void SearchSubGraph::InitMainGraphDevice() {
-  //  DeviceType main_device = DT_GPU;
-  //  Model::SubGraph *main_graph = model_->sub_graphs_.front();
-  //  for (uint32_t node_index : main_graph->node_indices_) {
-  //    Model::Node *node = model_->all_nodes_[node_index];
-  //    node->device_type_ = main_device;
-}
+void SearchSubGraph::InitMainGraphDevice() { return; }
 
 void SearchSubGraph::SubgraphFusion() {
   while (sub_graphs_.size() > 2) {