diff --git a/plugins/message_sign/main.py b/plugins/message_sign/main.py
index 5bb2474..5beecdb 100644
--- a/plugins/message_sign/main.py
+++ b/plugins/message_sign/main.py
@@ -357,32 +357,33 @@ class MessageSignPlugin(MessagePluginInterface):
                 )
                 return True, "无签到记录"
 
-            # 获取上次签到时间
+            # 获取上次签到时间并规范化到零点
             last_sign_date = None
             if user_record.get('last_sign_date'):
-                # 如果有last_sign_date字段，使用它
-                last_sign_date = user_record['last_sign_date']
+                last_sign_date = user_record['last_sign_date'].replace(hour=0, minute=0, second=0, microsecond=0)
             elif user_record.get('sign_stat'):
-                # 否则使用sign_stat
-                last_sign_date = user_record['sign_stat']
+                last_sign_date = user_record['sign_stat'].replace(hour=0, minute=0, second=0, microsecond=0)
 
             # 确保时区一致
             if isinstance(last_sign_date, datetime) and last_sign_date.tzinfo is None:
                 last_sign_date = pytz.timezone(self.timezone).localize(last_sign_date)
 
-            # 获取当前签到状态
-            sign_stat = user_record.get('sign_stat')
-            if isinstance(sign_stat, datetime) and sign_stat.tzinfo is None:
-                sign_stat = pytz.timezone(self.timezone).localize(sign_stat)
+            # 获取当前签到状态并规范化到零点
+            sign_stat = None
+            if user_record.get('sign_stat'):
+                sign_stat = user_record['sign_stat'].replace(hour=0, minute=0, second=0, microsecond=0)
+                if sign_stat.tzinfo is None:
+                    sign_stat = pytz.timezone(self.timezone).localize(sign_stat)
 
             # 检查是否已经签到今天
             if sign_stat and sign_stat >= today_start:
                 # 今天已经签到，检查是否需要补签昨天
                 if last_sign_date and last_sign_date >= day_before_yesterday and last_sign_date < yesterday:
                     # 上次签到在前天，今天已签到，可以补签昨天
-                    pass
+                    self.LOG.info(f"今天已签到，可以补签昨天，last_sign_date: {last_sign_date}")
                 else:
                     # 昨天已经签到了或者断签超过一天，不需要补签
+                    self.LOG.info(f"不符合补签条件，last_sign_date: {last_sign_date}, sign_stat: {sign_stat}")
                     self.message_util.send_text_msg(
                         "❌ 您昨天已经签到过了或断签超过一天，不符合补签条件！",
                         (roomid if roomid else sender), sender
@@ -391,6 +392,7 @@ class MessageSignPlugin(MessagePluginInterface):
             else:
                 # 今天未签到，检查是否符合补签条件（只能补签昨天）
                 if not last_sign_date or last_sign_date < day_before_yesterday:
+                    self.LOG.info(f"断签超过一天，last_sign_date: {last_sign_date}")
                     self.message_util.send_text_msg(
                         "❌ 只能补签断签一天的情况！您已断签超过一天或没有签到记录。",
                         (roomid if roomid else sender), sender
@@ -398,6 +400,7 @@ class MessageSignPlugin(MessagePluginInterface):
                     return True, "不符合补签条件"
 
                 if last_sign_date >= yesterday:
+                    self.LOG.info(f"昨天已签到，last_sign_date: {last_sign_date}")
                     self.message_util.send_text_msg(
                         "❌ 您昨天已经签到过了，不需要补签！",
                         (roomid if roomid else sender), sender