diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index 091b266f..c1ef677d 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -226,7 +226,7 @@ class MIOItemSerializer(CustomModelSerializer):
 
 class MIODoSerializer(CustomModelSerializer):
     belong_dept = serializers.PrimaryKeyRelatedField(
-        label="车间", queryset=Dept.objects.all(), required=True)
+        label="车间", queryset=Dept.objects.all(), required=False)
     do_user = serializers.PrimaryKeyRelatedField(
         label="执行人", queryset=User.objects.all(), required=True)
     note = serializers.CharField(
@@ -236,12 +236,13 @@ class MIODoSerializer(CustomModelSerializer):
         model = MIO
         fields = ['id', 'number', 'note', 'do_user',
                   'belong_dept', 'type', 'inout_date', 'mgroup', 'mio_user']
-        extra_kwargs = {'inout_date': {'required': True}, 
-                        'do_user': {'required': True}, 'belong_dept': {'required': False}}
+        extra_kwargs = {'inout_date': {'required': True}, 'do_user': {'required': True}}
 
     def validate(self, attrs):
         if 'mgroup' in attrs and attrs['mgroup']:
             attrs['belong_dept'] = attrs['mgroup'].belong_dept
+        if not attrs.get("belong_dept", None):
+            raise ParseError('请选择车间或工段')
         return attrs
     
     def create(self, validated_data):