diff --git a/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.cc b/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.cc
index 241485b357e..bfc0809a114 100644
--- a/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.cc
+++ b/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.cc
@@ -196,7 +196,7 @@ void AscendStreamAssign::AssignCommonStreamId(const CNodePtr &cur_cnode_ptr) {
 
 void AscendStreamAssign::AssignHcom(const NotNull<KernelGraphPtr> &graph_ptr) {
   auto cnode_ptr_list = graph_ptr->execution_order();
-  std::map<uint32_t, std::vector<CNodePtr>> graph_nodes_map;
+  std::map<std::string, std::map<uint32_t, std::vector<CNodePtr>>> group_graph_nodes_map;
   for (size_t i = 0; i < cnode_ptr_list.size(); ++i) {
     CNodePtr cur_cnode_ptr = cnode_ptr_list[i];
     // node has been assigned stream before
@@ -205,27 +205,52 @@ void AscendStreamAssign::AssignHcom(const NotNull<KernelGraphPtr> &graph_ptr) {
     }
 
     if (IsHcom(cur_cnode_ptr)) {
+      if (!AnfAlgo::HasNodeAttr(kAttrGroup, cur_cnode_ptr)) {
+        MS_LOG_EXCEPTION << "hcom cnode " << cur_cnode_ptr->DebugString() << " has no group attr";
+      }
+      auto group_name = AnfAlgo::GetNodeAttr<std::string>(cur_cnode_ptr, kAttrGroup);
       auto hcom_graph_id = AnfAlgo::GetGraphId(cur_cnode_ptr.get());
-      auto it = graph_nodes_map.find(hcom_graph_id);
-      if (it == graph_nodes_map.end()) {
+      auto iter = group_graph_nodes_map.find(group_name);
+      if (iter == group_graph_nodes_map.end()) {
+        std::map<uint32_t, std::vector<CNodePtr>> graph_nodes_map;
         graph_nodes_map[hcom_graph_id] = {cur_cnode_ptr};
+        group_graph_nodes_map[group_name] = graph_nodes_map;
       } else {
-        it->second.emplace_back(cur_cnode_ptr);
+        auto &graph_nodes_map = iter->second;
+        auto it = graph_nodes_map.find(hcom_graph_id);
+        if (it == graph_nodes_map.end()) {
+          graph_nodes_map[hcom_graph_id] = {cur_cnode_ptr};
+        } else {
+          it->second.emplace_back(cur_cnode_ptr);
+        }
       }
     }
   }
-  MS_LOG(INFO) << "hcom diff graph id size:" << graph_nodes_map.size();
-  for (const auto &item : graph_nodes_map) {
-    bool new_graph = true;
-    auto graph_id = item.first;
-    hcom_graph_map_[graph_id] = {};
-    for (const auto &hcom_node_ptr : item.second) {
-      auto assigned_stream_id = AssignHcomStreamId(hcom_node_ptr, new_graph);
-      hcom_graph_map_[graph_id].emplace(assigned_stream_id);
-      new_graph = false;
-    }
+
+  MS_LOG(INFO) << "hcom diff group size:" << group_graph_nodes_map.size();
+  for (const auto &item : group_graph_nodes_map) {
+    MS_LOG_INFO << "group id:" << item.first << "; diff graph id size:" << item.second.size();
+  }
+
+  for (const auto &diff_group : group_graph_nodes_map) {
+    // group id:
+    std::map<uint32_t, std::set<uint32_t>> hcom_graph_map;
+    for (const auto &item : diff_group.second) {
+      bool new_graph = true;
+      auto graph_id = item.first;
+      hcom_graph_map[graph_id] = {};
+      for (const auto &hcom_node_ptr : item.second) {
+        auto assigned_stream_id = AssignHcomStreamId(hcom_node_ptr, new_graph);
+        hcom_graph_map[graph_id].emplace(assigned_stream_id);
+        new_graph = false;
+      }
+    }
+    group_hcom_graph_map_[diff_group.first] = hcom_graph_map;
+  }
+
+  for (const auto &item : group_hcom_graph_map_) {
+    MS_LOG_INFO << "group id:" << item.first << "; hcom stream nums:" << item.second.size();
   }
-  MS_LOG(INFO) << "hcom stream nums : " << hcom_stream_map_.size();
 }
 
 uint32_t AscendStreamAssign::AssignHcomStreamId(const CNodePtr &cur_cnode_ptr, bool new_graph) {
@@ -337,7 +362,7 @@ void AscendStreamAssign::InsertStreamActive(const NotNull<KernelGraphPtr> &graph
 }
 
 void AscendStreamAssign::InsertStreamActiveForParallel(const NotNull<KernelGraphPtr> &graph_ptr) {
-  if (hcom_graph_map_.empty() && independent_graph_map_.empty()) {
+  if (group_hcom_graph_map_.empty() && independent_graph_map_.empty()) {
     MS_LOG(INFO) << "Hcom and independent is empty";
     return;
   }
@@ -347,19 +372,32 @@ void AscendStreamAssign::InsertStreamActiveForParallel(const NotNull<KernelGraph
     return;
   }
 
-  MS_LOG(DEBUG) << "Hcom grpah map size:" << hcom_graph_map_.size();
   std::map<uint32_t, std::set<uint32_t>> other_graph;
-  for (const auto &item : hcom_graph_map_) {
-    MS_LOG(INFO) << "Graph id:" << item.first;
-    if (item.first == root_graph_id) {
-      if (loop_sink_) {
-        ActiveRootGraphHcom(graph_ptr, item.second);
+  std::set<uint32_t> hcom_streams;
+  for (const auto &graph_nodes : group_hcom_graph_map_) {
+    for (const auto &item : graph_nodes.second) {
+      MS_LOG(INFO) << "Graph id:" << item.first;
+      if (item.first == root_graph_id) {
+        if (loop_sink_) {
+          hcom_streams.insert(item.second.begin(), item.second.end());
+        }
+      } else {
+        auto it = other_graph.find(item.first);
+        if (it == other_graph.end()) {
+          other_graph[item.first] = item.second;
+        } else {
+          for (const auto &stream : item.second) {
+            it->second.emplace(stream);
+          }
+        }
       }
-    } else {
-      other_graph[item.first] = item.second;
     }
   }
 
+  if (!hcom_streams.empty()) {
+    ActiveRootGraphHcom(graph_ptr, hcom_streams);
+  }
+
   MS_LOG(INFO) << "Independent graph map size:" << independent_graph_map_.size();
   for (const auto &item : independent_graph_map_) {
     MS_LOG(DEBUG) << "Graph id:" << item.first;
@@ -505,7 +543,6 @@ void AscendStreamAssign::ActiveRootGraphIndependent(const NotNull<KernelGraphPtr
   independent_stream_activated_ = true;
   graph_ptr->set_execution_order(update_cnode_list);
 }
-
 void AscendStreamAssign::InsertStreamActiveForCommon(const NotNull<KernelGraphPtr> &graph_ptr) {
   MS_LOG(INFO) << "Start";
   GetProcessedStream(graph_ptr);
@@ -733,7 +770,7 @@ bool AscendStreamAssign::IsProcessedStream(uint32_t stream_id) {
 void AscendStreamAssign::InsertEventForHcomParallel(const NotNull<KernelGraphPtr> &graph_ptr) {
   MS_LOG(INFO) << "Start";
   InsertEventCommonDependHcom(graph_ptr);
-  InsertEventHcomDependCommon(graph_ptr);
+  InsertEventHcomDependCommonBak(graph_ptr);
   InsertEventHcomDependHcom(graph_ptr);
   MS_LOG(INFO) << "End";
 }
@@ -777,36 +814,6 @@ void AscendStreamAssign::InsertEventCommonDependHcom(const NotNull<KernelGraphPt
   MS_LOG(INFO) << "After common depend hcom, total event nums:" << resource_manager.get_cur_event_num();
 }
 
-CNodePtr AscendStreamAssign::GetLastInputCnode(const NotNull<KernelGraphPtr> &graph_ptr,
-                                               const CNodePtr &cur_cnode_ptr) {
-  auto cnode_ptr_list = graph_ptr->execution_order();
-  auto &inputs = cur_cnode_ptr->inputs();
-  auto it_pos = cnode_ptr_list.begin();
-  for (size_t i = 1; i < inputs.size(); i++) {
-    if (inputs[i]->isa<CNode>()) {
-      auto cnode = inputs[i]->cast<CNodePtr>();
-      while (opt::IsNopNode(cnode)) {
-        cnode = cnode->inputs()[1]->cast<CNodePtr>();
-      }
-
-      auto it = std::find(it_pos, cnode_ptr_list.end(), cnode);
-      if (it != cnode_ptr_list.end()) {
-        it_pos = it;
-      }
-    } else {
-      continue;
-    }
-  }
-
-  if (it_pos == cnode_ptr_list.begin() && *it_pos != inputs[1]) {
-    MS_LOG(EXCEPTION) << "The input of node:" << AnfAlgo::GetCNodeName(cur_cnode_ptr) << "was not found";
-  }
-
-  MS_LOG(INFO) << "The las input of node:" << cur_cnode_ptr->DebugString() << " is:" << (*it_pos)->fullname_with_scope()
-               << "; name:" << (*it_pos)->DebugString();
-  return *it_pos;
-}
-
 // after memory reuse is correct, use this function
 void AscendStreamAssign::InsertEventHcomDependCommonBak(const NotNull<KernelGraphPtr> &graph_ptr) {
   AscendResourceMng &resource_manager = AscendResourceMng::GetInstance();
@@ -830,7 +837,7 @@ void AscendStreamAssign::InsertEventHcomDependCommonBak(const NotNull<KernelGrap
     auto last_input_cnode = GetLastInputCnode(graph_ptr, cur_cnode_ptr);
     auto it = std::find(cnodes.begin(), cnodes.end(), last_input_cnode);
     if (it == cnodes.end()) {
-      MS_LOG(ERROR) << "hcom:" << AnfAlgo::GetCNodeName(cur_cnode_ptr)
+      MS_LOG(ERROR) << "Hcom:" << AnfAlgo::GetCNodeName(cur_cnode_ptr)
                     << "get last input:" << AnfAlgo::GetCNodeName(last_input_cnode) << "; but last input not in cnodes";
     } else {
       uint32_t cur_event_id = resource_manager.ApplyNewEvent();
@@ -848,6 +855,58 @@ void AscendStreamAssign::InsertEventHcomDependCommonBak(const NotNull<KernelGrap
   MS_LOG(INFO) << "After hcom depend common, total event nums:" << resource_manager.get_cur_event_num();
 }
 
+CNodePtr AscendStreamAssign::GetLastInputCnode(const NotNull<KernelGraphPtr> &graph_ptr,
+                                               const CNodePtr &cur_cnode_ptr) {
+  auto cnode_ptr_list = graph_ptr->execution_order();
+  auto input_cnodes = GetInputKernels(cur_cnode_ptr);
+  if (input_cnodes.empty()) {
+    return nullptr;
+  }
+  auto it_pos = cnode_ptr_list.begin();
+
+  for (auto &cnode : input_cnodes) {
+    auto it = std::find(it_pos, cnode_ptr_list.end(), cnode);
+    if (it != cnode_ptr_list.end()) {
+      it_pos = it;
+    }
+  }
+  if (it_pos == cnode_ptr_list.begin() && *it_pos != input_cnodes.front()) {
+    MS_LOG(ERROR) << "The input of node:" << AnfAlgo::GetCNodeName(cur_cnode_ptr) << "was not found";
+  }
+
+  return *it_pos;
+}
+
+vector<CNodePtr> AscendStreamAssign::GetInputKernels(const CNodePtr &node) {
+  vector<CNodePtr> input_cnodes;
+  queue<CNodePtr> nop_nodes;
+  auto inputs = node->inputs();
+  for (size_t i = 1; i < inputs.size(); i++) {
+    auto real_input = AnfAlgo::VisitKernel(inputs[i], 0);
+    auto node = real_input.first;
+    if (opt::IsNopNode(node)) {
+      nop_nodes.push(node->cast<CNodePtr>());
+      while (!nop_nodes.empty()) {
+        auto cur_node = nop_nodes.front();
+        nop_nodes.pop();
+        auto new_inputs = cur_node->inputs();
+        for (size_t j = 1; j < new_inputs.size(); j++) {
+          auto new_real_input = AnfAlgo::VisitKernel(new_inputs[j], 0);
+          auto new_node = new_real_input.first;
+          if (opt::IsNopNode(new_node)) {
+            nop_nodes.push(new_node->cast<CNodePtr>());
+          } else if (new_node->isa<CNode>()) {
+            input_cnodes.emplace_back(new_node->cast<CNodePtr>());
+          }
+        }
+      }
+    } else if (node->isa<CNode>()) {
+      input_cnodes.emplace_back(node->cast<CNodePtr>());
+    }
+  }
+  return input_cnodes;
+}
+
 void AscendStreamAssign::InsertEventHcomDependCommon(const NotNull<KernelGraphPtr> &graph_ptr) {
   AscendResourceMng &resource_manager = AscendResourceMng::GetInstance();
   auto cnode_ptr_list = graph_ptr->execution_order();
@@ -896,40 +955,70 @@ void AscendStreamAssign::InsertEventHcomDependCommon(const NotNull<KernelGraphPt
 void AscendStreamAssign::InsertEventHcomDependHcom(const NotNull<KernelGraphPtr> &graph_ptr) {
   AscendResourceMng &resource_manager = AscendResourceMng::GetInstance();
   auto cnode_ptr_list = graph_ptr->execution_order();
-  uint32_t first_hcom_stream = kInvalidStreamId;
-  uint32_t last_hcom_stream = kInvalidStreamId;
-  // key: stream id, value:hcom index
-  std::map<uint32_t, vector<size_t>> hcom_index;
+  // key:group id, key: stream id, value:hcom index
+  std::map<std::string, std::map<uint32_t, vector<size_t>>> group_hcom_index;
+  std::map<std::string, uint32_t> group_first_hcom_stream;
+  std::map<std::string, uint32_t> group_last_hcom_stream;
   for (size_t i = 0; i < cnode_ptr_list.size(); i++) {
     auto cur_cnode = cnode_ptr_list[i];
     if (!IsHcom(cur_cnode)) {
       continue;
     }
     uint32_t cur_stream_id = AnfAlgo::GetStreamId(cur_cnode);
-    auto it = hcom_index.find(cur_stream_id);
-    if (it != hcom_index.end()) {
-      hcom_index[cur_stream_id].emplace_back(i);
-    } else {
+    if (!AnfAlgo::HasNodeAttr(kAttrGroup, cur_cnode)) {
+      MS_LOG_EXCEPTION << "hcom cnode " << cur_cnode->DebugString() << " has no group attr";
+    }
+    auto group_name = AnfAlgo::GetNodeAttr<std::string>(cur_cnode, kAttrGroup);
+    auto iter = group_hcom_index.find(group_name);
+    if (iter == group_hcom_index.end()) {
+      std::map<uint32_t, vector<size_t>> hcom_index;
       hcom_index[cur_stream_id] = {i};
+      group_hcom_index[group_name] = hcom_index;
+    } else {
+      auto &hcom_index = iter->second;
+      auto it = hcom_index.find(cur_stream_id);
+      if (it == hcom_index.end()) {
+        hcom_index[cur_stream_id] = {i};
+      } else {
+        it->second.emplace_back(i);
+      }
     }
 
     // record first hcom stream id
-    if (first_hcom_stream == kInvalidStreamId) {
-      first_hcom_stream = cur_stream_id;
+    auto it = group_first_hcom_stream.find(group_name);
+    if (it == group_first_hcom_stream.end()) {
+      group_first_hcom_stream[group_name] = cur_stream_id;
     }
 
     // record last hcom stream id
-    if (cur_stream_id != last_hcom_stream) {
-      last_hcom_stream = cur_stream_id;
+    it = group_last_hcom_stream.find(group_name);
+    if (it != group_last_hcom_stream.end()) {
+      it->second = cur_stream_id;
+    } else {
+      group_last_hcom_stream[group_name] = cur_stream_id;
     }
   }
 
-  if (hcom_index.size() < 2) {
-    MS_LOG(INFO) << "Different stream hcom size is less than 2, no need insert event between them";
-    return;
+  for (const auto &hcom_index : group_hcom_index) {
+    if (hcom_index.second.size() < 2) {
+      MS_LOG(INFO) << "Different stream hcom size is less than 2, no need insert event between them";
+      return;
+    }
+    auto group_name = hcom_index.first;
+    auto it = group_first_hcom_stream.find(group_name);
+    if (it == group_first_hcom_stream.end()) {
+      MS_LOG_EXCEPTION << "Can't find first hcom stream, hcom group id:" << group_name;
+    }
+    auto first_hcom_stream = it->second;
+
+    it = group_last_hcom_stream.find(group_name);
+    if (it == group_last_hcom_stream.end()) {
+      MS_LOG_EXCEPTION << "Can't find last hcom stream, hcom group id:" << group_name;
+    }
+    auto last_hcom_stream = it->second;
+    InsertEventBetweenHcom(graph_ptr, hcom_index.second, first_hcom_stream, last_hcom_stream);
+    MS_LOG(INFO) << "After hcom depend hcom, total event nums:" << resource_manager.get_cur_event_num();
   }
-  InsertEventBetweenHcom(graph_ptr, hcom_index, first_hcom_stream, last_hcom_stream);
-  MS_LOG(INFO) << "After hcom depend hcom, total event nums:" << resource_manager.get_cur_event_num();
 }
 
 void AscendStreamAssign::InsertEventBetweenHcom(const NotNull<KernelGraphPtr> &graph_ptr,
@@ -1199,9 +1288,12 @@ void AscendStreamAssign::GetNeedActiveStreams(const NotNull<KernelGraphPtr> &gra
 
   // 3)hcom stream:if has not been activate, push to need active vector
   if (!hcom_stream_activated_) {
-    auto it = hcom_graph_map_.find(root_graph_id);
-    if (it != hcom_graph_map_.end()) {
-      std::copy(it->second.begin(), it->second.end(), std::back_inserter(need_first_active_streams_));
+    for (const auto &item : group_hcom_graph_map_) {
+      auto &hcom_graph_map = item.second;
+      auto it = hcom_graph_map.find(root_graph_id);
+      if (it != hcom_graph_map.end()) {
+        std::copy(it->second.begin(), it->second.end(), std::back_inserter(need_first_active_streams_));
+      }
     }
   }
 
@@ -1434,7 +1526,7 @@ void AscendStreamAssign::Reset() {
   event_map_.clear();
   independent_targets_.clear();
   independent_graph_map_.clear();
-  hcom_graph_map_.clear();
+  group_hcom_graph_map_.clear();
   middle_active_streams_.clear();
 }
 
diff --git a/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.h b/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.h
index 34c1e41ca1e..c8f6979c342 100644
--- a/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.h
+++ b/mindspore/ccsrc/runtime/device/ascend/ascend_stream_assign.h
@@ -22,6 +22,7 @@
 #include <map>
 #include <set>
 #include <string>
+#include <queue>
 #include <vector>
 #include <memory>
 #include <unordered_set>
@@ -35,6 +36,7 @@ namespace mindspore {
 namespace device {
 namespace ascend {
 using std::map;
+using std::queue;
 using std::shared_ptr;
 using std::unordered_map;
 using std::unordered_set;
@@ -184,6 +186,7 @@ class AscendStreamAssign {
   void PrintStreamGroups();
   void FindEventRelations(const NotNull<KernelGraphPtr> &graph_ptr);
   bool IsSatisfiedEvent(uint32_t send_stream_id, uint32_t recv_stream_id) const;
+  vector<CNodePtr> GetInputKernels(const CNodePtr &node);
 
   bool independent_stream_activated_{false};
   bool hcom_stream_activated_{false};
@@ -195,8 +198,9 @@ class AscendStreamAssign {
   std::set<uint32_t> processed_streams_{};
   std::vector<uint32_t> need_first_active_streams_{};
   std::set<CNodeKey> independent_targets_;
+
+  std::map<std::string, std::map<uint32_t, std::set<uint32_t>>> group_hcom_graph_map_;
   // key:graph id, value:stream set
-  std::map<uint32_t, std::set<uint32_t>> hcom_graph_map_;
   std::map<uint32_t, std::set<uint32_t>> independent_graph_map_;
 
   // attr for memory copy reuse