diff --git a/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindProvider.cs
index 7db20d88f..d49547c53 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/DbBindProvider/DbBindProvider.cs
@@ -140,7 +140,7 @@ namespace SqlSugar
         public virtual string GetPropertyTypeName(string dbTypeName)
         {
             dbTypeName = dbTypeName.ToLower();
-            var propertyTypes = MappingTypes.Where(it => it.Key == dbTypeName);
+            var propertyTypes = MappingTypes.Where(it => it.Key.Equals(dbTypeName,StringComparison.CurrentCultureIgnoreCase));
             if (dbTypeName == "int32")
             {
                 return "int";