diff --git a/backend/app/main_graph/subgraph_wrapper.py b/backend/app/main_graph/subgraph_wrapper.py
index 91c08f5..345bb7e 100644
--- a/backend/app/main_graph/subgraph_wrapper.py
+++ b/backend/app/main_graph/subgraph_wrapper.py
@@ -9,6 +9,7 @@ from langchain_core.runnables.config import RunnableConfig
 
 from .state import MainGraphState, ErrorRecord, ErrorSeverity
 from backend.app.logger import info
+from ._utils import dispatch_custom_event, make_react_event
 
 
 def wrap_subgraph_for_error_handling(subgraph, name: str):
@@ -23,27 +24,23 @@ def wrap_subgraph_for_error_handling(subgraph, name: str):
     """
     async def wrapped_node(state: MainGraphState, config: Optional[RunnableConfig] = None) -> MainGraphState:
         # 发送子图开始事件
-        if config:
-            try:
-                from langchain_core.callbacks.manager import adispatch_custom_event
-                callbacks = config.get("callbacks")
-                if callbacks:
-                    await adispatch_custom_event(
-                        "react_reasoning",
-                        {
-                            "step": state.reasoning_step,
-                            "action": f"{name}_subgraph_start",
-                            "confidence": 1.0,
-                            "reasoning": f"开始执行 {name} 子图..."
-                        },
-                        callbacks=callbacks
-                    )
-            except Exception as e:
-                info(f"[{name}_subgraph] 无法发送开始事件: {e}")
+        try:
+            await dispatch_custom_event(
+                "react_reasoning",
+                make_react_event(
+                    state.reasoning_step,
+                    f"{name}_subgraph_start",
+                    1.0,
+                    f"开始执行 {name} 子图..."
+                ),
+                config
+            )
+        except Exception as e:
+            info(f"[{name}_subgraph] 无法发送开始事件: {e}")
 
         try:
-            # 调用子图
-            result = subgraph.invoke(state)
+            # 调用子图（异步，传 config）
+            result = await subgraph.ainvoke(state, config=config)
 
             # 更新主图状态
             subgraph_result = None
@@ -75,23 +72,19 @@ def wrap_subgraph_for_error_handling(subgraph, name: str):
             })
 
             # 发送子图完成事件
-            if config:
-                try:
-                    from langchain_core.callbacks.manager import adispatch_custom_event
-                    callbacks = config.get("callbacks")
-                    if callbacks:
-                        await adispatch_custom_event(
-                            "react_reasoning",
-                            {
-                                "step": state.reasoning_step,
-                                "action": f"{name}_subgraph_complete",
-                                "confidence": 1.0,
-                                "reasoning": f"{name} 子图执行完成"
-                            },
-                            callbacks=callbacks
-                        )
-                except Exception as e:
-                    info(f"[{name}_subgraph] 无法发送完成事件: {e}")
+            try:
+                await dispatch_custom_event(
+                    "react_reasoning",
+                    make_react_event(
+                        state.reasoning_step,
+                        f"{name}_subgraph_complete",
+                        1.0,
+                        f"{name} 子图执行完成"
+                    ),
+                    config
+                )
+            except Exception as e:
+                info(f"[{name}_subgraph] 无法发送完成事件: {e}")
 
             return state
 
@@ -113,23 +106,19 @@ def wrap_subgraph_for_error_handling(subgraph, name: str):
             state.success = False
 
             # 发送子图错误事件
-            if config:
-                try:
-                    from langchain_core.callbacks.manager import adispatch_custom_event
-                    callbacks = config.get("callbacks")
-                    if callbacks:
-                        await adispatch_custom_event(
-                            "react_reasoning",
-                            {
-                                "step": state.reasoning_step,
-                                "action": f"{name}_subgraph_error",
-                                "confidence": 1.0,
-                                "reasoning": f"{name} 子图执行失败: {str(e)}"
-                            },
-                            callbacks=callbacks
-                        )
-                except Exception as e:
-                    info(f"[{name}_subgraph] 无法发送错误事件: {e}")
+            try:
+                await dispatch_custom_event(
+                    "react_reasoning",
+                    make_react_event(
+                        state.reasoning_step,
+                        f"{name}_subgraph_error",
+                        1.0,
+                        f"{name} 子图执行失败: {str(e)}"
+                    ),
+                    config
+                )
+            except Exception as e:
+                info(f"[{name}_subgraph] 无法发送错误事件: {e}")
 
             return state