diff --git a/Src/Asp.NetCore2/SqlSugar.OceanBaseForOracle/OceanBase/SqlBuilder/OceanBaseForOracleExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar.OceanBaseForOracle/OceanBase/SqlBuilder/OceanBaseForOracleExpressionContext.cs
index cb9b4920a..c06b3d1c7 100644
--- a/Src/Asp.NetCore2/SqlSugar.OceanBaseForOracle/OceanBase/SqlBuilder/OceanBaseForOracleExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar.OceanBaseForOracle/OceanBase/SqlBuilder/OceanBaseForOracleExpressionContext.cs
@@ -273,7 +273,7 @@ namespace SqlSugar.OceanBaseForOracle
         public override string ToDate(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];
-            return string.Format(" cast({0} as TIMESTAMP)", parameter.MemberName);
+            return string.Format(" TO_TIMESTAMP({0}, 'YYYY-MM-DD HH24:MI:SS.FF') ", parameter.MemberName);
         }
         public override string ToDateShort(MethodCallExpressionModel model)
         {