diff --git a/apps/inm/services.py b/apps/inm/services.py
index 8de7c4bf..6fb4203c 100644
--- a/apps/inm/services.py
+++ b/apps/inm/services.py
@@ -463,7 +463,8 @@ class InmService:
 
     @classmethod
     def revert_and_del(cls, mioitem: MIOItem):
-        mio = mioitem.mio
+        # 锁定 MIO 行，防止多人同时撤销不同明细时并发漏删 MIO
+        mio = MIO.objects.select_for_update().get(id=mioitem.mio_id)
         if mio.submit_time is None:
             raise ParseError("未提交的出入库明细不允许撤销")
         if mioitem.test_date is not None:
@@ -484,4 +485,7 @@ class InmService:
             mioitem.delete()
         else:
             raise ParseError("不支持该出入库单明细撤销")
+        # 若该出入库记录已无明细，自动删除
+        if not MIOItem.objects.filter(mio=mio).exists():
+            mio.delete()
         
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