diff --git a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs
index a984e58f8..57b8960a3 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs
@@ -33,6 +33,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitDynamicCoread12321.Init();
             UnitManyToManyadfafa.Init();
             UnitAsyncToken.Init();
             UnitManyToMany121231.Init();
diff --git a/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitDynamicCoread12321.cs b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitDynamicCoread12321.cs
new file mode 100644
index 000000000..9a7523378
--- /dev/null
+++ b/Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitDynamicCoread12321.cs
@@ -0,0 +1,101 @@
+using SqlSugar;
+using System;
+using System.Linq.Dynamic.Core;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    public class UnitDynamicCoread12321
+    {
+        /// <summary>
+        /// 管理系统角色
+        ///</summary>
+        [SugarTable("a", IsDisabledUpdateAll = true)]
+        public class AT
+        {
+
+            /// <summary>
+            /// 角色名称 
+            ///</summary>
+            [SugarColumn(ColumnName = "id")]
+            public long Id { get; set; }
+
+            /// <summary>
+            /// 角色名称 
+            ///</summary>
+            [SugarColumn(ColumnName = "name", Length = 100)]
+            public string Name { get; set; } = string.Empty;
+
+            /// <summary>
+            /// 角色描述
+            ///</summary>
+            [SugarColumn(ColumnName = "desc", Length = 100)]
+            public string Desc { get; set; } = string.Empty;
+
+            public string BName { get; set; }
+
+        }
+
+        /// <summary>
+        /// 管理系统角色
+        ///</summary>
+        [SugarTable("b", IsDisabledUpdateAll = true)]
+        public class BT
+        {
+
+            /// <summary>
+            /// 角色名称 
+            ///</summary>
+            [SugarColumn(ColumnName = "id")]
+            public long Id { get; set; }
+
+
+            /// <summary>
+            /// 角色名称 
+            ///</summary>
+            [SugarColumn(ColumnName = "aid")]
+            public long Aid { get; set; }
+
+            /// <summary>
+            /// 角色名称 
+            ///</summary>
+            [SugarColumn(ColumnName = "name", Length = 100)]
+            public string Name { get; set; } = string.Empty;
+
+            /// <summary>
+            /// 角色描述
+            ///</summary>
+            [SugarColumn(ColumnName = "desc", Length = 100)]
+            public string Desc { get; set; } = string.Empty;
+
+        }
+
+
+        public static  void Init()
+        {
+
+            StaticConfig.DynamicExpressionParserType = typeof(DynamicExpressionParser);
+            var db = NewUnitTest.Db;
+
+            var shortNames = DynamicParameters.Create("x", typeof(AT), "u", typeof(BT));
+            var sql = db.QueryableByObject(typeof(AT), "x")
+                .AddJoinInfo(typeof(BT),
+                    shortNames,
+                    $"x.Id==u.Aid",
+                    JoinType.Left)
+                .Select(shortNames, $"new (x.Name as Name,u.Name as BName)", typeof(AT))
+                .ToSql().Key;
+            if (sql.Contains( "Aid")) 
+            {
+                throw new Exception("unit error");
+            }
+
+            Console.WriteLine(sql);
+
+            /// SELECT  `x`.`name` AS `Name` , `u`.`name` AS `BName`  FROM `a` x Left JOIN `b` `u` ON ( `x`.`id` = `u`.`Aid` )
+
+
+        }
+    }
+
+}