diff --git a/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlBlukCopy.cs b/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlBlukCopy.cs
index 78c9015fd..25bcf559a 100644
--- a/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlBlukCopy.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlBlukCopy.cs
@@ -131,7 +131,7 @@ namespace SqlSugar
         {
             if (this.Chara == null)
             {
-                return "UTF8";
+                return "utf8mb4";
             }
             else
             {