diff --git a/apps/enp/serializers.py b/apps/enp/serializers.py
index 0812fcae..831d8a20 100644
--- a/apps/enp/serializers.py
+++ b/apps/enp/serializers.py
@@ -76,4 +76,5 @@ class VehicleAccessSerializer(CustomModelSerializer):
 
 class EnvDataExportSerializer(serializers.Serializer):
     time = serializers.DateTimeField(label='时间')
-    type = serializers.CharField(label='导出类型')
+    type = serializers.ChoiceField(
+        label='导出类型', choices=['hour', 'day', 'week', 'month', 'season', 'year'])