diff --git a/apps/scheduler/executor/agent.py b/apps/scheduler/executor/agent.py
index 6e8a7b6a3a5283f89795c910f7a1ef1ba551051e..a3068d11c45bc52d44dd0263252b49d3e8bcb30e 100644
--- a/apps/scheduler/executor/agent.py
+++ b/apps/scheduler/executor/agent.py
@@ -71,21 +71,25 @@ class MCPAgentExecutor(BaseExecutor):
     )
     resoning_llm: ReasoningLLM = Field(
         description="推理大模型",
-        default=ReasoningLLM()
+        default_factory=ReasoningLLM,
+        exclude=True
     )
     function_call_llm: FunctionLLM = Field(
         description="函数调用大模型",
-        default=FunctionLLM()
+        default_factory=FunctionLLM,
+        exclude=True
     )
     app_owner: str = Field(default="", description="应用所有者")
     auto_execute: bool | None = Field(default=None, description="是否自动执行（来自请求）")
     mcp_host: MCPHost = Field(
         description="MCP主机",
-        default=MCPHost()
+        default_factory=MCPHost,
+        exclude=True
     )
     mcp_planner: MCPPlanner = Field(
         description="MCP规划器",
-        default=MCPPlanner()
+        default_factory=MCPPlanner,
+        exclude=True
     )
 
     async def init_llms(self) -> None:
diff --git a/apps/scheduler/executor/step.py b/apps/scheduler/executor/step.py
index 04600e84064e39c7107008ffefaf63bc840b1606..525f9efc81eb69c07c53f80b91c38981007d87e6 100644
--- a/apps/scheduler/executor/step.py
+++ b/apps/scheduler/executor/step.py
@@ -6,10 +6,10 @@ import logging
 import uuid
 from collections.abc import AsyncGenerator
 from datetime import UTC, datetime
-from typing import Any, Field
+from typing import Any
 import json
 import jsonschema
-from pydantic import ConfigDict
+from pydantic import ConfigDict, Field
 
 from apps.scheduler.call.core import CoreCall
 from apps.scheduler.call.empty import Empty