diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index c1ef677d..9f8e8731 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -119,7 +119,8 @@ class MIOItemCreateSerializer(CustomModelSerializer):
         mio:MIO = validated_data['mio']
         mb = validated_data.get('mb', None)
         wm = validated_data.get('wm', None)
-        if mio.type == MIO.MIO_TYPE_DO_IN:
+        assemb = validated_data.pop('assemb', [])
+        if mio.type == MIO.MIO_TYPE_DO_IN and not assemb:
             if not wm:
                 raise ParseError('生产入库必须指定车间库存')
         elif mio.type == MIO.MIO_TYPE_DO_OUT:
@@ -150,7 +151,6 @@ class MIOItemCreateSerializer(CustomModelSerializer):
         with transaction.atomic():
             count = validated_data["count"]
             batch = validated_data["batch"]
-            assemb = validated_data.pop('assemb', [])
             mioitemw = validated_data.pop('mioitemw', [])
             instance = super().create(validated_data)
             assemb_dict = {}