diff --git a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
index c655c2dd4..5ad33f19b 100644
--- a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
+++ b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
@@ -142,6 +142,7 @@
     <Compile Include="UnitTest\UDelete.cs" />
     <Compile Include="UnitTest\UFastest.cs" />
     <Compile Include="UnitTest\UConfig.cs" />
+    <Compile Include="UnitTest\UnitUpdateNav.cs" />
     <Compile Include="UnitTest\UOneManyMany5.cs" />
     <Compile Include="UnitTest\UOneManyMany4.cs" />
     <Compile Include="UnitTest\UOneManyMany3.cs" />
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs b/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
index 0f9fa8edf..1b46f7d5e 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()
         {
+            UnitUpdateNav.Init();
             UnitOneToOneN.Init();
             ULock.Init();
             UnitManyToMany2.Init();
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateNav.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateNav.cs
new file mode 100644
index 000000000..4003aaf8f
--- /dev/null
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateNav.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static OrmTest.UOneManyMany4;
+
+namespace OrmTest 
+{
+    internal class UnitUpdateNav
+    {
+        public static void Init()
+        {
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables<Student_004, School_004, Room_004, Desk_004, Book_004>();
+            db.DbMaintenance.TruncateTable<Student_004, School_004, Room_004, Desk_004, Book_004>();
+
+            var id1 = Guid.NewGuid();
+            var id2 = Guid.NewGuid();
+            var id3 = Guid.NewGuid();
+            var id4 = Guid.NewGuid();
+            db.Insertable(new Student_004() { sid = id1, Name = "北大jack", SchoolId = id1 }).ExecuteCommand();
+            db.Insertable(new Student_004() { sid = id2, Name = "青华jack", SchoolId = id2 }).ExecuteCommand();
+
+            db.Insertable(new School_004() { scid = id1, schname = "北大" }).ExecuteCommand();
+            db.Insertable(new School_004() { scid = id2, schname = "青华" }).ExecuteCommand();
+            db.Insertable(new Book_004() { StudentId = id1, Name = "数学001" }).ExecuteCommand();
+            db.Insertable(new Book_004() { StudentId = id2, Name = "语文002" }).ExecuteCommand();
+
+
+            db.Insertable(new Room_004() { roomId = id1, schoolId = id1, roomName = "北大01室" }).ExecuteCommand();
+            db.Insertable(new Room_004() { roomId = id2, schoolId = id1, roomName = "北大02室" }).ExecuteCommand();
+            db.Insertable(new Room_004() { roomId = id3, schoolId = id2, roomName = "青华03室" }).ExecuteCommand();
+            db.Insertable(new Room_004() { roomId = id4, schoolId = id2, roomName = "青华04室" }).ExecuteCommand();
+
+            db.Insertable(new Desk_004() { roomId = id1, deskid = id1, deskName = "北大01室_01" }).ExecuteCommand();
+            db.Insertable(new Desk_004() { roomId = id2, deskid = id2, deskName = "北大02室_01" }).ExecuteCommand();
+            db.Insertable(new Desk_004() { roomId = id3, deskid = id3, deskName = "青华03室_01" }).ExecuteCommand();
+            db.Insertable(new Desk_004() { roomId = id4, deskid = id4, deskName = "青华04室_01" }).ExecuteCommand();
+
+
+            var list = db.Queryable<Student_004>()
+                         .Includes(x => x.school_001, x => x.rooms, x => x.desk)
+                         .Includes(x => x.books)
+                .Where(x => x.school_001.rooms.Any(z => z.desk.Any())).ToList();
+
+            if (list.Count() != 2)
+            {
+                throw new Exception("unit error");
+            }
+            list.First().books = new List<Book_004>();
+              db.UpdateNav(list)
+                .Include(x=>x.books).ExecuteCommand();
+
+            var list2 = db.Queryable<Student_004>()
+              .Includes(x => x.books).ToList();
+
+            if (list2.First().books.Count > 0) 
+            {
+                throw new Exception("unit error");
+            }
+            if (list2.Last().books.Count == 0)
+            {
+                throw new Exception("unit error");
+            }
+        }
+    }
+}