diff --git a/services/process_monitor.py b/services/process_monitor.py
index 1f26424..9e9a409 100644
--- a/services/process_monitor.py
+++ b/services/process_monitor.py
@@ -443,11 +443,27 @@ class ProcessMonitor:
     
     def stop_session(self, session_id):
         """停止会话"""
+        # 先尝试从内存中停止
         if session_id in self.active_sessions:
             self.active_sessions[session_id]['stop'] = True
             self.active_sessions[session_id]['paused'] = False
             db.update_session_status(session_id, 'stopped')
+            logger.info(f"停止会话(内存): {session_id}")
             return True
+        
+        # 如果不在内存中，检查数据库并直接更新状态
+        session = db.get_process_session(session_id)
+        if session:
+            # 只有运行中或暂停状态的会话才能停止
+            if session.get('status') in ('running', 'paused', 'pending'):
+                db.update_session_status(session_id, 'stopped')
+                logger.info(f"停止会话(数据库): {session_id}")
+                return True
+            else:
+                logger.warning(f"会话状态为 {session.get('status')}，无法停止")
+                return False
+        
+        logger.warning(f"会话不存在: {session_id}")
         return False
     
     def get_session_status(self, session_id):