diff --git a/app/DataBase/msg.py b/app/DataBase/msg.py
index a6bdc7e..915efa7 100644
--- a/app/DataBase/msg.py
+++ b/app/DataBase/msg.py
@@ -87,6 +87,24 @@ class Msg:
         result.sort(key=lambda x: x[5])
         return result
 
+    def get_messages_length(self):
+        sql = '''
+            select count(*)
+            from MSG
+        '''
+        if not self.open_flag:
+            return None
+        try:
+            lock.acquire(True)
+            self.cursor.execute(sql)
+            result = self.cursor.fetchone()
+        except Exception as e:
+            result = None
+        finally:
+            lock.release()
+        return result[0]
+
+
     def get_message_by_num(self, username_, local_id):
         sql = '''
                 select localId,TalkerId,Type,SubType,IsSender,CreateTime,Status,StrContent,strftime('%Y-%m-%d %H:%M:%S',CreateTime,'unixepoch','localtime') as StrTime
@@ -213,4 +231,4 @@ if __name__ == '__main__':
     pprint(msg.get_message_by_num('wxid_0o18ef858vnu22', local_id))
     print(msg.get_messages_by_keyword(wxid, '干嘛'))
     pprint(msg.get_messages_by_keyword(wxid, '干嘛')[0])
-    print(msg.get_first_time_of_message('wxid_0o18ef858vnu22'))
+    print(msg.get_first_time_of_message('wxid_fervbwign7m822'))
diff --git a/app/ui_pc/chat/chat_info.py b/app/ui_pc/chat/chat_info.py
index 9e8e36a..5464be6 100644
--- a/app/ui_pc/chat/chat_info.py
+++ b/app/ui_pc/chat/chat_info.py
@@ -142,7 +142,7 @@ class ShowChatThread(QThread):
     # heightSingal = pyqtSignal(int)
     def __init__(self, contact):
         super().__init__()
-        self.last_message_id = 9999999
+        self.last_message_id = msg_db.get_messages_length() or 9999999
         self.wxid = contact.wxid
 
     def run(self) -> None: