diff --git a/bot/dashscope/dashscope_session.py b/bot/dashscope/dashscope_session.py
index 0de57b926..e432f67a4 100644
--- a/bot/dashscope/dashscope_session.py
+++ b/bot/dashscope/dashscope_session.py
@@ -4,7 +4,7 @@
 
 class DashscopeSession(Session):
     def __init__(self, session_id, system_prompt=None, model="qwen-turbo"):
-        super().__init__(session_id)
+        super().__init__(session_id, system_prompt=system_prompt)
         self.reset()
 
     def discard_exceeding(self, max_tokens, cur_tokens=None):
diff --git a/bot/session_manager.py b/bot/session_manager.py
index a6e89f956..ce2fe2968 100644
--- a/bot/session_manager.py
+++ b/bot/session_manager.py
@@ -19,7 +19,8 @@ def reset(self):
 
     def set_system_prompt(self, system_prompt):
         self.system_prompt = system_prompt
-        self.reset()
+        if self.messages and self.messages[0]["role"] == "system":
+            self.messages[0]["content"] = system_prompt
 
     def add_query(self, query):
         user_item = {"role": "user", "content": query}
@@ -46,18 +47,18 @@ def __init__(self, sessioncls, **session_args):
         self.sessioncls = sessioncls
         self.session_args = session_args
 
-    def build_session(self, session_id, system_prompt=None):
+    def build_session(self, session_id):
         """
         如果session_id不在sessions中，创建一个新的session并添加到sessions中
         如果system_prompt不会空，会更新session的system_prompt并重置session
         """
         if session_id is None:
-            return self.sessioncls(session_id, system_prompt, **self.session_args)
-
+            return self.sessioncls(session_id, **self.session_args)
+        
         if session_id not in self.sessions:
-            self.sessions[session_id] = self.sessioncls(session_id, system_prompt, **self.session_args)
-        elif system_prompt is not None:  # 如果有新的system_prompt，更新并重置session
-            self.sessions[session_id].set_system_prompt(system_prompt)
+            self.sessions[session_id] = self.sessioncls(session_id, **self.session_args)
+        elif self.session_args.get("system_prompt"):  # 如果有新的system_prompt，更新并重置session
+            self.sessions[session_id].set_system_prompt(self.session_args.get("system_prompt"))
         session = self.sessions[session_id]
         return session
 
diff --git a/plugins/role/role.py b/plugins/role/role.py
index 8890a6299..e2e80f6c1 100644
--- a/plugins/role/role.py
+++ b/plugins/role/role.py
@@ -19,7 +19,8 @@ def __init__(self, bot, sessionid, desc, wrapper=None):
         self.sessionid = sessionid
         self.wrapper = wrapper or "%s"  # 用于包装用户输入
         self.desc = desc
-        self.bot.sessions.build_session(self.sessionid, system_prompt=self.desc)
+        self.bot.sessions.session_args.update({"system_prompt": self.desc})
+        self.bot.sessions.build_session(self.sessionid)
 
     def reset(self):
         self.bot.sessions.clear_session(self.sessionid)
@@ -28,6 +29,7 @@ def action(self, user_action):
         session = self.bot.sessions.build_session(self.sessionid)
         if session.system_prompt != self.desc:  # 目前没有触发session过期事件，这里先简单判断，然后重置
             session.set_system_prompt(self.desc)
+            session.reset()
         prompt = self.wrapper % user_action
         return prompt