diff --git a/prompt/system_prompt.md b/prompt/system_prompt.md
index dc9edd9..5bbb5a8 100644
--- a/prompt/system_prompt.md
+++ b/prompt/system_prompt.md
@@ -56,15 +56,17 @@ When creating scripts in `executable_code/`, follow these organization rules:
   - Example: `executable_code/invoice_parser/parse_invoice.py` for invoice parsing scripts
   - Example: `executable_code/data_extractor/extract.py` for data extraction scripts
 
-- **Temporary Scripts**: Place short-lived or experimental scripts in tmp subfolder
-  - Format: `executable_code/tmp/script.py`
-  - Example: `executable_code/tmp/debug_test.py` for debugging scripts
+- **Temporary Scripts**: AVOID creating temporary script files when possible
+  - **Preferred**: Use `python -c "..."` for one-off scripts (inline execution)
+  - **Fallback**: Only create files if the script is too complex or requires file persistence
+  - **Location**: `executable_code/tmp/script.py` (when file creation is necessary)
+  - **Cleanup**: Files in `{agent_dir_path}/executable_code/tmp/` older than 3 days will be automatically deleted
 
 **Path Examples:**
 - Skill script: `{agent_dir_path}/skills/rag-retrieve/scripts/rag_retrieve.py`
 - Dataset file: `{agent_dir_path}/dataset/document.txt`
 - Task-specific script: `{agent_dir_path}/executable_code/invoice_parser/parse.py`
-- Temporary script: `{agent_dir_path}/executable_code/tmp/test.py`
+- Temporary script (when needed): `{agent_dir_path}/executable_code/tmp/test.py`
 - Downloaded file: `{agent_dir_path}/download/report.pdf`
 
 ## System Information
diff --git a/routes/chat.py b/routes/chat.py
index 1fb6e0e..597b748 100644
--- a/routes/chat.py
+++ b/routes/chat.py
@@ -1,6 +1,8 @@
 import json
 import os
 import asyncio
+import shutil
+import time
 from typing import Union, Optional, Any, List, Dict
 from fastapi import APIRouter, HTTPException, Header
 from fastapi.responses import StreamingResponse
@@ -393,6 +395,41 @@ async def _execute_post_agent_hooks(config: AgentConfig, response: str) -> None:
         # hook执行失败不影响主流程
         logger.error(f"Failed to execute PostAgent hooks: {e}")
 
+    # 清理 executable_code/tmp 文件夹
+    await _cleanup_tmp_folder(config)
+
+
+async def _cleanup_tmp_folder(config: AgentConfig) -> None:
+    """
+    清理 executable_code/tmp 文件夹中 3 天前的文件
+
+    Args:
+        config: AgentConfig 对象
+    """
+    try:
+        if config.project_dir and config.bot_id:
+            tmp_dir = os.path.join(config.project_dir, "executable_code", "tmp")
+            if os.path.exists(tmp_dir):
+                # 3 天前的秒数（3 * 24 * 60 * 60 = 259200）
+                three_days_ago = time.time() - (3 * 24 * 60 * 60)
+
+                deleted_count = 0
+                for item in os.listdir(tmp_dir):
+                    item_path = os.path.join(tmp_dir, item)
+                    # 检查修改时间
+                    if os.path.getmtime(item_path) < three_days_ago:
+                        if os.path.isfile(item_path) or os.path.islink(item_path):
+                            os.remove(item_path)
+                        else:
+                            shutil.rmtree(item_path)
+                        deleted_count += 1
+                        logger.debug(f"Deleted old item: {item_path}")
+
+                logger.info(f"Cleaned up {deleted_count} old item(s) from tmp folder: {tmp_dir}")
+    except Exception as e:
+        # 清理失败不影响主流程
+        logger.error(f"Failed to cleanup tmp folder: {e}")
+
 
 @router.post("/api/v1/chat/completions")
 async def chat_completions(request: ChatRequest, authorization: Optional[str] = Header(None)):