diff --git a/hb_server/apps/em/services.py b/hb_server/apps/em/services.py
index 15f5b08..0c1eba4 100644
--- a/hb_server/apps/em/services.py
+++ b/hb_server/apps/em/services.py
@@ -8,11 +8,13 @@ class EmService:
     def update_check_date(cls, equip:Equipment):
         # 根据校准检定记录变更下次日期
         check = ECheckRecord.objects.filter(equipment=equip).order_by('id').last()
+        equip.check_date = check.check_date
         if check:
             if equip.cycle:
-                equip.check_date = check.check_date
-                if equip.next_check_date:
-                    equip.next_check_date = equip.next_check_date + relativedelta(months=equip.cycle)
-                else:
-                    equip.next_check_date = timezone.now() + relativedelta(months=equip.cycle)
-                equip.save()
\ No newline at end of file
+                equip.next_check_date = equip.check_date + relativedelta(months=equip.cycle)
+            else:
+                equip.next_check_date = None
+        else:
+            equip.check_date = None
+            equip.next_check_date = None
+        equip.save()
\ No newline at end of file