diff --git a/Src/Asp.Net/MySqlTest/Demo/Demo1_Queryable.cs b/Src/Asp.Net/MySqlTest/Demo/Demo1_Queryable.cs
index 4160b26a1..f919b048a 100644
--- a/Src/Asp.Net/MySqlTest/Demo/Demo1_Queryable.cs
+++ b/Src/Asp.Net/MySqlTest/Demo/Demo1_Queryable.cs
@@ -86,6 +86,7 @@ namespace OrmTest
             var test05 = db.Queryable<Order>().Where(it => it.CreateTime.Month == dp.Month).ToList();
             var fromatList = db.Queryable<Order>().Select(it => it.CreateTime.ToString("%Y-%m")).ToList();
             var test06 = db.Queryable<Order>().Where(it => it.CreateTime.Date.Day >= DateTime.Now.Date.Day).ToList();
+            var test07 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Day, Convert.ToDateTime("2021-1-1"), Convert.ToDateTime("2021-1-12"))).ToList();
             Console.WriteLine("#### Examples End ####");
         }
 
diff --git a/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs
index 4b3ba15b2..328e222d8 100644
--- a/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs
@@ -14,6 +14,13 @@ namespace SqlSugar
     }
     public class MySqlMethod : DefaultDbMethod, IDbMethods
     {
+        public override string DateDiff(MethodCallExpressionModel model)
+        {
+            var parameter = model.Args[0];
+            var parameter2 = model.Args[1];
+            var parameter3 = model.Args[2];
+            return string.Format(" TIMESTAMPDIFF({0},{1},{2}) ", parameter.MemberValue?.ToString().ToSqlFilter(), parameter2.MemberName, parameter3.MemberName);
+        }
         public override string DateValue(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];