diff --git a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
index d3b925018..a732b5554 100644
--- a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
+++ b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
@@ -94,6 +94,7 @@
     <Compile Include="Models\OrderItem.cs" />
     <Compile Include="Demo\Demo0_SqlSugarClient.cs" />
     <Compile Include="Models\ViewOrder.cs" />
+    <Compile Include="UnitTest\UCustom018.cs" />
     <Compile Include="UnitTest\Models\Order.cs" />
     <Compile Include="UnitTest\Models\RoleEntity.cs" />
     <Compile Include="UnitTest\Models\TestModel.cs" />
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs b/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
index 34ce5477d..2cded3d6e 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UCustom018.Init();
             UCustom017.Init();
             UCustom016.Init();
             UCustom015.Init();
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UCustom018.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UCustom018.cs
new file mode 100644
index 000000000..b96b5a61c
--- /dev/null
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UCustom018.cs
@@ -0,0 +1,129 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+namespace OrmTest
+{
+    public class UCustom018
+    {
+        public static void Init()
+        {
+            var db = new SqlSugarScope(new SqlSugar.ConnectionConfig()
+            {
+                ConnectionString = Config.ConnectionString,
+                DbType = DbType.SqlServer,
+                IsAutoCloseConnection = true
+            });
+
+
+            //建表 
+            if (!db.DbMaintenance.IsAnyTable("unit_Patent_License", false))
+            {
+                db.CodeFirst.InitTables<Patent_License>();
+            }
+
+
+
+
+            //建表 
+            if (!db.DbMaintenance.IsAnyTable("Enterprise", false))
+            {
+                db.CodeFirst.InitTables<UintEnterprise>();
+            }
+            db.DbMaintenance.TruncateTable<Patent_License, UintEnterprise>();
+            db.Insertable(new Patent_License()
+            {
+                Id = "1",
+                Licensee_Id = 1,
+                Licensor_Id = 1
+            }).ExecuteCommand();
+            db.Insertable(new UintEnterprise()
+            {
+                Id = 1,
+                Createtime = DateTime.Now,
+                Name = ""
+            }).ExecuteCommand();
+
+
+
+            RefAsync<int> totalCount = 0;
+
+            var data = db.Queryable<Patent_License>()
+
+                .LeftJoin<UintEnterprise>((pl, db_licensor) => pl.Licensor_Id == db_licensor.Id)
+
+                .LeftJoin<UintEnterprise>((pl, db_licensor, db_licensee) => pl.Licensee_Id == db_licensee.Id)
+
+
+                .Select((pl, db_licensor, db_licensee) => new
+                {
+
+                    License = pl,
+
+                    LicensorId = (long?)db_licensor.Id,
+
+                    LicensorName = db_licensor.Name,
+
+                    LicenseeId = (long?)db_licensee.Id,
+
+                    LicenseeName = db_licensee.Name
+
+                })
+
+                .ToPageListAsync(1, 2, totalCount).GetAwaiter().GetResult();
+
+        }
+        [SugarTable("unit_Patent_License")]
+        public class Patent_License
+
+        {
+
+
+
+            [SugarColumn(ColumnName = "id", IsPrimaryKey = true)]
+
+            public string Id { get; set; }
+
+
+
+            [SugarColumn(ColumnName = "licensor_id")]
+
+            public long Licensor_Id { get; set; }
+
+
+
+
+
+            [SugarColumn(ColumnName = "licensee_id")]
+
+            public long Licensee_Id { get; set; }
+
+        }
+
+        public class UintEnterprise
+
+        {
+
+            [SugarColumn(ColumnName = "id", IsPrimaryKey = true)]
+
+            public long Id { get; set; }
+
+
+
+
+
+            [SugarColumn(ColumnName = "name")]
+
+            public string Name { get; set; }
+
+
+
+            [SugarColumn(ColumnName = "createtime")]
+
+            public DateTime Createtime { get; set; }
+
+        }
+    }
+}