diff --git a/skillagent/skillengine.py b/skillagent/skillengine.py
index 6f66df4..712ca37 100644
--- a/skillagent/skillengine.py
+++ b/skillagent/skillengine.py
@@ -249,10 +249,16 @@ class IndustrialSkillEngine:
 				}
 			})
 			env = self.request._run_ns
-			user_reply = await env.session_getvalue(sessionkey)
-			while not user_reply:
+			cnt = 0
+			while True:
 				await asyncio.sleep(0.5)
 				user_reply = await env.session_getvalue(sessionkey)
+				if user_reply:
+					break
+				if cnt >= 60:
+					debug('env.session_getvalue("{sessionkey}") get None')
+					cnt = 0
+				cnt += 1
 			debug(f'{user_reply=}===============================')
 			prompt = f"{user_prompt}\n补充输入：{user_reply}"
 			await self._run(prompt, context=context, is_retry=True)