diff --git a/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs b/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
index 646378d58..55cffe521 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
@@ -172,6 +172,11 @@ namespace SqlSugar
                     sqlParameter.DbType = System.Data.DbType.AnsiStringFixedLength;
                     sqlParameter.Value = parameter.Value;
                 }
+                else if (parameter.DbType == System.Data.DbType.AnsiString)
+                {
+                    sqlParameter.DbType = System.Data.DbType.AnsiString;
+                    sqlParameter.Value = parameter.Value;
+                }
                 else
                 {
                     if (parameter.Value != null && parameter.Value.GetType() == UtilConstants.GuidType)