diff --git a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
index edba3b0c7..8f8a42958 100644
--- a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
+++ b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
@@ -97,6 +97,7 @@
     <Compile Include="Models\OrderItem.cs" />
     <Compile Include="Demo\Demo0_SqlSugarClient.cs" />
     <Compile Include="Models\ViewOrder.cs" />
+    <Compile Include="UnitTest\UnitUpdateSubQuery.cs" />
     <Compile Include="UnitTest\UnitManyToManyDeleteNav.cs" />
     <Compile Include="UnitTest\UnitCustom12312.cs" />
     <Compile Include="UnitTest\UnitEnum22.cs" />
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs b/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
index 9f25f290d..5ea60b0c0 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()
         {
+            UnitUpdateSubQuery.Init();
             UnitManyToManyDeleteNav.Init();
             UnitTestReturnPkList.Init();
             UnitCustom12312.Init();
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateSubQuery.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateSubQuery.cs
new file mode 100644
index 000000000..cc157067a
--- /dev/null
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateSubQuery.cs
@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+
+namespace OrmTest
+{
+    public class UnitUpdateSubQuery
+    {
+        public static void Init()
+        {
+            var db = NewUnitTest.Db;
+
+            //建表 
+            if (!db.DbMaintenance.IsAnyTable("ClassEntity", false))
+            {
+                db.CodeFirst.InitTables<ClassEntity>();
+            }
+            if (!db.DbMaintenance.IsAnyTable("ClassStudentEntity", false))
+            {
+                db.CodeFirst.InitTables<ClassStudentEntity>();
+            }
+            if (!db.DbMaintenance.IsAnyTable("StudentEntity", false))
+            {
+                db.CodeFirst.InitTables<StudentEntity>();
+            }
+            db.DbMaintenance.TruncateTable("ClassEntity");
+            db.DbMaintenance.TruncateTable("ClassStudentEntity");
+            db.DbMaintenance.TruncateTable("StudentEntity");
+
+            //插入数据
+            var @class = new ClassEntity
+            {
+                StudentQty = 0
+            };
+            db.Insertable(@class).ExecuteCommand();
+            var classStudentList = new List<ClassStudentEntity>
+            {
+                new ClassStudentEntity{ ClassID = 1, StudentID = 1}
+            };
+            db.Insertable(classStudentList).ExecuteCommand();
+            var studentList = new List<StudentEntity>
+            {
+                new StudentEntity{ Name = "张三" }
+            };
+            db.Insertable(studentList).ExecuteCommand();
+            var result = new SimpleClient<ClassEntity>(db).AsQueryable().Select(t => new ClassEntity
+            {
+                StudentQty = SqlFunc.Subqueryable<ClassStudentEntity>()
+            .InnerJoin<StudentEntity>((tt, tt1) => tt.StudentID == tt1.StudentID)
+            .Where(tt => tt.ClassID == t.ClassID)
+            .Count()
+            }).ToList();
+            //用例代码
+            var result2 = new SimpleClient<ClassEntity>(db).Update(t => new ClassEntity
+            {
+                StudentQty = SqlFunc.Subqueryable<ClassStudentEntity>()
+                    .InnerJoin<StudentEntity>((tt, tt1) => tt.StudentID == tt1.StudentID)
+                    .Where(tt => tt.ClassID == t.ClassID)
+                    .Count()
+            }, tt => tt.ClassID == 1);
+            db.DbMaintenance.DropTable("ClassEntity");
+            db.DbMaintenance.DropTable("ClassStudentEntity");
+            db.DbMaintenance.DropTable("StudentEntity");
+            Console.WriteLine(result);
+            Console.WriteLine("用例跑完");
+            Console.ReadKey();
+        }
+
+        internal class ClassEntity
+        {
+            [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+            public int ClassID { get; set; }
+
+            public int StudentQty { get; set; }
+        }
+        internal class ClassStudentEntity
+        {
+            [SugarColumn(IsPrimaryKey = true)]
+            public int ClassID { get; set; }
+
+            [SugarColumn(IsPrimaryKey = true)]
+            public int StudentID { get; set; }
+        }
+        internal class StudentEntity
+        {
+            [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+            public int StudentID { get; set; }
+
+            public string Name { get; set; }
+        }
+    }
+}