diff --git a/FreeSql/DataAnnotations/ExpressionCallAttribute.cs b/FreeSql/DataAnnotations/ExpressionCallAttribute.cs
index 6970eca9..85daa395 100644
--- a/FreeSql/DataAnnotations/ExpressionCallAttribute.cs
+++ b/FreeSql/DataAnnotations/ExpressionCallAttribute.cs
@@ -85,6 +85,11 @@ namespace FreeSql.DataAnnotations
             /// <param name="exp"></param>
             /// <returns></returns>
             string ParseExpression(Expression exp);
+
+            /// <summary>
+            /// (非公开)内部公共工具类方法
+            /// </summary>
+            CommonUtils CommonUtils { get; }
         }
 
         class DefaultUtility : IUtility
@@ -92,8 +97,8 @@ namespace FreeSql.DataAnnotations
             internal ExpressionCallContext _context;
 
             public TableInfo GetTableByEntity(Type entityType) => _context?._commonExp._common.GetTableByEntity(entityType);
-
             public string ParseExpression(Expression exp) => _context?._commonExp.ExpressionLambdaToSql(exp, _context._tsc.CloneDisableDiyParse());
+            public CommonUtils CommonUtils => _context?._commonExp._common;
         }
     }
 }
diff --git a/FreeSql/FreeSql.xml b/FreeSql/FreeSql.xml
index 330dc4ac..4cea215e 100644
--- a/FreeSql/FreeSql.xml
+++ b/FreeSql/FreeSql.xml
@@ -292,6 +292,11 @@
             <param name="exp"></param>
             <returns></returns>
         </member>
+        <member name="P:FreeSql.DataAnnotations.ExpressionCallContext.IUtility.CommonUtils">
+            <summary>
+            (非公开)内部公共工具类方法
+            </summary>
+        </member>
         <member name="T:FreeSql.DataAnnotations.IndexAttribute">
             <summary>
             索引设置，如：[Index("{tablename}_idx_01", "name")]