diff --git a/apps/mtm/services.py b/apps/mtm/services.py
index 9c4a4783..d935fc48 100644
--- a/apps/mtm/services.py
+++ b/apps/mtm/services.py
@@ -124,8 +124,8 @@ def mgroup_run_change(mgroup: Mgroup, new_run: bool, last_timex: datetime):
                 last_stlog.save()
                 cal_exp_duration_sec(last_stlog.id)  # 触发时间分配
             elif last_stlog.end_time and new_run is False and last_timex > last_stlog.end_time:  # 从开到停
-                last_stlog2 = StLog.objects.filter(mgroup=mgroup, is_shutdown=True).order_by("-start_time").first()
-                if not last_stlog2:
+                has_same_stlog =StLog.objects.filter(mgroup=mgroup, is_shutdown=True, start_time=last_timex).exists()
+                if not has_same_stlog:
                     StLog.objects.create(title="停机", is_shutdown=True, mgroup=mgroup, end_time=None, start_time=last_timex, sflog=get_sflog(mgroup, last_timex))
     elif new_run is False:
         StLog.objects.create(title="停机", is_shutdown=True, mgroup=mgroup, end_time=None, start_time=last_timex, sflog=get_sflog(mgroup, last_timex))