diff --git a/apps/inm/services.py b/apps/inm/services.py
index f7313e7e..2733a98f 100644
--- a/apps/inm/services.py
+++ b/apps/inm/services.py
@@ -232,10 +232,6 @@ class InmService:
         """
         更新库存, 支持反向操作
         """
-        in_or_out = 1
-        if is_reverse:
-            in_or_out = -1
-        
         if instance.type == MIO.MIO_TYPE_PUR_IN:  # 需要更新订单
             # 这里还需要对入厂检验进行处理
             if is_reverse:
@@ -244,7 +240,10 @@ class InmService:
                 for item in MIOItem.objects.filter(mio=instance):
                     BatchSt.g_create(batch=item.batch, mio=instance, material_start=item.material)
             from apps.pum.services import PumService
-            cls.update_mb(instance, in_or_out)
+            if is_reverse:
+                cls.update_mb(instance, -1)
+            else:
+                cls.update_mb(instance, 1)
             PumService.mio_purin(instance, is_reverse)
         elif instance.type == MIO.MIO_TYPE_OTHER_IN:
             if is_reverse:
@@ -252,7 +251,10 @@ class InmService:
             else:
                 for item in MIOItem.objects.filter(mio=instance):
                     BatchSt.g_create(batch=item, mio=instance, material_start=item.material)
-            cls.update_mb(instance, in_or_out)
+            if is_reverse:
+                cls.update_mb(instance, -1)
+            else:
+                cls.update_mb(instance, 1)
         elif instance.type == MIO.MIO_TYPE_DO_IN:
             mioitems = MIOItem.objects.filter(mio=instance)
             if is_reverse: