diff --git a/IRaCIS.Core.Infrastructure/_IRaCIS/ObjectExtension.cs b/IRaCIS.Core.Infrastructure/_IRaCIS/ObjectExtension.cs
index 687ac403f..c51693fe3 100644
--- a/IRaCIS.Core.Infrastructure/_IRaCIS/ObjectExtension.cs
+++ b/IRaCIS.Core.Infrastructure/_IRaCIS/ObjectExtension.cs
@@ -61,7 +61,7 @@ namespace IRaCIS.Core.Infrastructure.Extention
                 object propertyValue = property.GetValue(obj);
 
                 // 如果属性的类型是枚举，将其值保留为整数
-                if (property.PropertyType.IsEnum || Nullable.GetUnderlyingType(property.PropertyType)?.IsEnum == true)
+                if (property.PropertyType.IsEnum || (Nullable.GetUnderlyingType(property.PropertyType)?.IsEnum == true && propertyValue!=null) )
                 {
                     dictionary.Add(propertyName, (int)propertyValue);
                 }