diff --git a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
index ecf3ee1f9..3e6664021 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
@@ -280,10 +280,11 @@ namespace SqlSugar
             foreach (DataColumn item in dataTable.Columns)
             {
                 var isPrimaryKey = whereColumns.Any(it => it.EqualCase(item.ColumnName));
-                builder.CreateProperty(item.ColumnName, item.DataType, new SugarColumn()
+                builder.CreateProperty(item.ColumnName,typeof(Nullable<>).MakeGenericType(item.DataType), new SugarColumn()
                 {
                     IsPrimaryKey = isPrimaryKey,
-                    IsIdentity=isIdentity&& isPrimaryKey
+                    IsIdentity=isIdentity&& isPrimaryKey,
+                    IsNullable= true,
 
                 });
             }