diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UCustom012.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UCustom012.cs
index 997929d74..10d5e4639 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/UCustom012.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UCustom012.cs
@@ -51,6 +51,13 @@ namespace OrmTest
             db.Insertable(new BookA() { BookId = 4, Name = "php", studenId = 3 }).ExecuteCommand();
             db.Insertable(new BookA() { BookId = 5, Name = "js", studenId = 4 }).ExecuteCommand();
 
+
+            var list2 = db.Queryable<StudentA>()
+           .Includes(x => x.SchoolA, x => x.RoomList)//2个参数就是 then Include 
+           .Includes(x => x.Books)
+           .Where(x => x.SchoolA.SchoolName == "北大")
+           .ToList();
+
             //先用Mapper导航映射查出第二层
             var list = db.Queryable<StudentA>().Mapper(x => x.SchoolA, x => x.SchoolId).ToList();
 
@@ -65,10 +72,7 @@ namespace OrmTest
             });
      
 
-            var list2=db.Queryable<StudentA>()
-                .Includes(x => x.SchoolA, x => x.RoomList)//2个参数就是 then Include 
-                .Includes(x => x.Books) 
-                .ToList();
+       
             db.CodeFirst.InitTables<A1, B1, ABMapping1>();
             db.DbMaintenance.TruncateTable<A1>();
             db.DbMaintenance.TruncateTable<B1>();
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs
index ad95598fc..19748e87a 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs
@@ -58,7 +58,24 @@ namespace SqlSugar
             }
             else if (isMemberValue)
             {
-                ResolveMemberValue(parameter, baseParameter, isLeft, isSetTempData, expression);
+                var nav = new OneToOneNavgateExpression(this.Context?.SugarContext?.Context);
+                if (nav.IsNavgate(expression))
+                {
+                    var value = nav.GetSql();
+                    this.Context.SingleTableNameSubqueryShortName = nav.ShorName;
+                    if (isSetTempData)
+                    {
+                        baseParameter.CommonTempData = value;
+                    }
+                    else
+                    {
+                        AppendValue(parameter, isLeft, value);
+                    }
+                }
+                else
+                {
+                    ResolveMemberValue(parameter, baseParameter, isLeft, isSetTempData, expression);
+                }
             }
             else if (fieldIsBool && !isField && !isSelectField)
             {
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/NavgateExpression.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/NavgateExpression.cs
index a08f57907..6f5e4d357 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/NavgateExpression.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/NavgateExpression.cs
@@ -7,11 +7,15 @@ using System.Threading.Tasks;
 
 namespace SqlSugar 
 {
-    internal class NavgateExpression
+    internal class OneToOneNavgateExpression
     {
         private SqlSugarProvider context;
-
-        public NavgateExpression(SqlSugarProvider context)
+        private EntityInfo EntityInfo;
+        private EntityInfo ProPertyEntity;
+        private Navigat Navigat;
+        public string ShorName;
+        private string MemberName;
+        public OneToOneNavgateExpression(SqlSugarProvider context)
         {
             this.context = context;
         }
@@ -26,13 +30,44 @@ namespace SqlSugar
             if (exp is MemberExpression) 
             {
                 var memberExp=exp as MemberExpression;
+                var childExpression = memberExp.Expression;
+                if (childExpression != null && childExpression is MemberExpression) 
+                {
+                    var child2Expression = (childExpression as MemberExpression).Expression;
+                    if (child2Expression.Type.IsClass()&& child2Expression is ParameterExpression) 
+                    {
+                       var entity= this.context.EntityMaintenance.GetEntityInfo(child2Expression.Type);
+                        if (entity.Columns.Any(x => x.PropertyName == (childExpression as MemberExpression).Member.Name && x.Navigat != null)) 
+                        {
+                            EntityInfo = entity;
+                            ShorName = child2Expression.ToString();
+                            MemberName= memberExp.Member.Name;
+                            ProPertyEntity = this.context.EntityMaintenance.GetEntityInfo(childExpression.Type);
+                            Navigat = entity.Columns.FirstOrDefault(x => x.PropertyName == (childExpression as MemberExpression).Member.Name).Navigat;
+                            return true;
+                        }
+                    }
+                }
             }
             return false;
         }
 
-        internal void Execute(MapperExpressionResolve mapperExpressionResolve)
+
+        internal MapperSql GetSql()
         {
-          
+            var pk = this.ProPertyEntity.Columns.First(it => it.IsPrimarykey == true).DbColumnName;
+            var name = this.EntityInfo.Columns.First(it => it.PropertyName == Navigat.Name).DbColumnName;
+            var selectName = this.ProPertyEntity.Columns.First(it => it.PropertyName ==MemberName).DbColumnName;
+            MapperSql mapper = new MapperSql();
+            var queryable = this.context.Queryable<object>();
+            pk = queryable.QueryBuilder.Builder.GetTranslationColumnName(pk);
+            name = queryable.QueryBuilder.Builder.GetTranslationColumnName(name);
+            selectName = queryable.QueryBuilder.Builder.GetTranslationColumnName(selectName);
+            mapper.Sql = queryable
+                .AS(this.ProPertyEntity.DbTableName)
+                .Where($" {ShorName}.{name}={pk} ").Select(selectName).ToSql().Key;
+            mapper.Sql = $" ({mapper.Sql}) ";
+            return mapper;
         }
     }
 }