diff --git a/apps/mtm/serializers.py b/apps/mtm/serializers.py
index 222ccd52..36154844 100644
--- a/apps/mtm/serializers.py
+++ b/apps/mtm/serializers.py
@@ -40,7 +40,7 @@ class MaterialSerializer(CustomModelSerializer):
         return f'{obj.name}|{obj.specification if obj.specification else ""}|{obj.model if obj.model else ""}|{obj.process.name if obj.process else ""}'
 
     def create(self, validated_data):
-        if Material.objects.filter(name=validated_data['name'], specification=validated_data['specification'], model=validated_data['model'], process=validated_data['process']).exists():
+        if Material.objects.filter(name=validated_data['name'], specification=validated_data.get('specification', None), model=validated_data.get('model', None), process=validated_data.get('process', None)).exists():
             raise serializers.ValidationError('物料已存在')
         return super().create(validated_data)