diff --git a/Src/Asp.Net/SqlSugar/Abstract/CodeFirstProvider/CodeFirstProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/CodeFirstProvider/CodeFirstProvider.cs
index f7ce73c16..267a45878 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/CodeFirstProvider/CodeFirstProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/CodeFirstProvider/CodeFirstProvider.cs
@@ -286,7 +286,7 @@ namespace SqlSugar
                 var alterColumns = entityColumns
                                            .Where(ec => !dbColumns.Any(dc => dc.DbColumnName.Equals(ec.OldDbColumnName, StringComparison.CurrentCultureIgnoreCase)))
                                            .Where(ec =>
-                                                          dbColumns.Any(dc => dc.DbColumnName.Equals(ec.DbColumnName)
+                                                          dbColumns.Any(dc => dc.DbColumnName.EqualCase(ec.DbColumnName)
                                                                && ((ec.Length != dc.Length && !UtilMethods.GetUnderType(ec.PropertyInfo).IsEnum() && UtilMethods.GetUnderType(ec.PropertyInfo).IsIn(UtilConstants.StringType)) ||
                                                                     ec.IsNullable != dc.IsNullable ||
                                                                     IsNoSamgeType(ec, dc)))).ToList();