diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs b/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs
index 7201c7847..cde502d78 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs
@@ -498,7 +498,7 @@ AND syscomments.text LIKE '%"+tableName+"%'");
             ConvertCreateColumnInfo(column);
             if (column.DataType != null && this.Context.CurrentConnectionConfig?.MoreSettings?.SqlServerCodeFirstNvarchar == true)
             {
-                if (!column.DataType.ToLower().Contains("nvarchar"))
+                if (!column.DataType.ToLower().Contains("nvarchar") && !column.DataType.EndsWith(")"))
                 {
                     column.DataType = column.DataType.ToLower().Replace("varchar", "nvarchar");
                 }