diff --git a/apps/utils/serializers.py b/apps/utils/serializers.py
index 7ab62326..0a890411 100755
--- a/apps/utils/serializers.py
+++ b/apps/utils/serializers.py
@@ -75,7 +75,7 @@ class CustomModelSerializer(DynamicFieldsMixin, TreeSerializerMixin, serializers
 class QuerySerializer(serializers.Serializer):
     field = serializers.CharField(label='字段名')
     compare = serializers.ChoiceField(
-        label='比较式', choices=["", "!", "gte", "gt", "lte", "lt", "in", "contains"])
+        label='比较式', choices=["", "!", "gte", "gt", "lte", "lt", "in", "contains", "isnull"])
     value = serializers.CharField(label='值')