diff --git a/apps/application/serializers/common.py b/apps/application/serializers/common.py
index e8ac10809..f38080cd8 100644
--- a/apps/application/serializers/common.py
+++ b/apps/application/serializers/common.py
@@ -6,6 +6,7 @@
     @date：2025/6/9 13:42
     @desc:
 """
+import json
 from typing import List
 
 from django.core.cache import cache
@@ -19,6 +20,7 @@ from application.models import Application, ChatRecord, Chat, ApplicationVersion
 from application.serializers.application_chat import ChatCountSerializer
 from common.constants.cache_version import Cache_Version
 from common.database_model_manage.database_model_manage import DatabaseModelManage
+from common.encoder.encoder import SystemEncoder
 from common.exception.app_exception import ChatException
 from knowledge.models import Document
 from models_provider.models import Model
@@ -234,7 +236,7 @@ class ChatInfo:
             'knowledge_id_list': self.knowledge_id_list,
             'exclude_document_id_list': self.exclude_document_id_list,
             'application_id': self.application_id,
-            'chat_record_list': [self.chat_record_to_map(c) for c in self.chat_record_list],
+            'chat_record_list': [self.chat_record_to_map(c) for c in self.chat_record_list][-20:],
             'debug': self.debug
         }
 
@@ -255,7 +257,7 @@ class ChatInfo:
 
     @staticmethod
     def map_to_chat_record(chat_record_dict):
-        ChatRecord(id=chat_record_dict.get('id'),
+        return ChatRecord(id=chat_record_dict.get('id'),
                    chat_id=chat_record_dict.get('chat_id'),
                    vote_status=chat_record_dict.get('vote_status'),
                    problem_text=chat_record_dict.get('problem_text'),
@@ -270,21 +272,24 @@ class ChatInfo:
                    index=chat_record_dict.get('index'), )
 
     def set_cache(self):
-        cache.set(Cache_Version.CHAT.get_key(key=self.chat_id), self.to_dict(),
+        cache.set(Cache_Version.CHAT.get_key(key=self.chat_id),json.dumps( self.to_dict(),cls=SystemEncoder),
                   version=Cache_Version.CHAT_INFO.get_version(),
                   timeout=60 * 30)
 
     @staticmethod
     def map_to_chat_info(chat_info_dict):
-        return ChatInfo(chat_info_dict.get('chat_id'), chat_info_dict.get('chat_user_id'),
-                        chat_info_dict.get('chat_user_type'), chat_info_dict.get('knowledge_id_list'),
-                        chat_info_dict.get('exclude_document_id_list'),
-                        chat_info_dict.get('application_id'),
-                        [ChatInfo.map_to_chat_record(c_r) for c_r in chat_info_dict.get('chat_record_list')])
+        c = ChatInfo(chat_info_dict.get('chat_id'), chat_info_dict.get('chat_user_id'),
+                     chat_info_dict.get('chat_user_type'), chat_info_dict.get('knowledge_id_list'),
+                     chat_info_dict.get('exclude_document_id_list'),
+                     chat_info_dict.get('application_id'),
+                     debug=chat_info_dict.get('debug'))
+        c.chat_record_list = [ChatInfo.map_to_chat_record(c_r) for c_r in chat_info_dict.get('chat_record_list')]
+        return c
 
     @staticmethod
     def get_cache(chat_id):
-        chat_info_dict = cache.get(Cache_Version.CHAT.get_key(key=chat_id), version=Cache_Version.CHAT_INFO.get_version())
+        chat_info_dict = cache.get(Cache_Version.CHAT.get_key(key=chat_id),
+                                   version=Cache_Version.CHAT_INFO.get_version())
         if chat_info_dict:
-            return ChatInfo.map_to_chat_info(chat_info_dict)
+            return ChatInfo.map_to_chat_info(json.loads(chat_info_dict))
         return None
diff --git a/apps/chat/serializers/chat.py b/apps/chat/serializers/chat.py
index 28e361292..bd0ff01aa 100644
--- a/apps/chat/serializers/chat.py
+++ b/apps/chat/serializers/chat.py
@@ -446,10 +446,7 @@ class ChatSerializers(serializers.Serializer):
     def get_chat_info(self):
         self.is_valid(raise_exception=True)
         chat_id = self.data.get('chat_id')
-        chat_info: ChatInfo = ChatInfo.get_cache(chat_id)
-        if chat_info is None:
-            chat_info: ChatInfo = self.re_open_chat(chat_id)
-            chat_info.set_cache()
+        chat_info: ChatInfo = self.re_open_chat(chat_id)
         return chat_info
 
     def re_open_chat(self, chat_id: str):