diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index bf209833..1b3330a0 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -80,7 +80,7 @@ class MIOListSerializer(CustomModelSerializer):
 
 class MIOItemACreateSerializer(CustomModelSerializer):
     class Meta:
-        model = MIOItem
+        model = MIOItemA
         fields = ['material', 'batch', 'zhuidu',
                   'b_zuidawaijing', 'g_zuidaneijing']