diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 441eadc3..c8227290 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -86,7 +86,10 @@ def make_sflogs(mgroup: Mgroup, start_date: datetime.date, end_date: datetime.da
             end_time = datetime.datetime.combine(current_date, end_time_o)
             # 以下代码是解决跨天排班时生成当天班次缺少的bug
             if start_time > end_time:
-                end_time += datetime.timedelta(days=1)
+                if end_time.hour == 0:
+                    end_time += datetime.timedelta(days=1)
+                else:
+                    start_time -= datetime.timedelta(days=1)
             total_sec = (end_time - start_time).total_seconds()
 
             # 创建SfLog记录