diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavOneToMany.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavOneToMany.cs
index 54be3acd0..d1b33208d 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavOneToMany.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavOneToMany.cs
@@ -4,16 +4,92 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace SqlSugar 
+namespace SqlSugar
 {
     public partial class DeleteNavProvider<Root, T> where T : class, new() where Root : class, new()
     {
 
-
         private void DeleteOneToMany<TChild>(string name, EntityColumnInfo nav) where TChild : class, new()
         {
-            throw new NotImplementedException();
+            var parentEntity = _ParentEntity;
+            var prentList = _ParentList.Cast<T>().ToList();
+            var parentNavigateProperty = parentEntity.Columns.FirstOrDefault(it => it.PropertyName == name);
+            var thisEntity = this._Context.EntityMaintenance.GetEntityInfo<TChild>();
+            var thisPkColumn = GetPkColumnByNav(thisEntity, nav);
+            var thisFkColumn = GetFKColumnByNav(thisEntity, nav);
+            EntityColumnInfo parentPkColumn = GetParentPkColumn();
+            EntityColumnInfo parentNavColumn = GetParentPkNavColumn(nav);
+            if (parentNavColumn != null)
+            {
+                parentPkColumn = parentNavColumn;
+            }
+
+            if (!_IsDeletedParant)
+                SetContext(() => this._Context.Deleteable(prentList).ExecuteCommand());
+
+            var ids = _ParentList.Select(it => parentPkColumn.PropertyInfo.GetValue(it)).ToList();
+            var childList = this._Context.Queryable<TChild>().In(thisFkColumn.DbColumnName, ids).ToList();
+           
+            this._ParentList = childList.Cast<object>().ToList();
+            this._ParentPkColumn = thisPkColumn;
+            this._IsDeletedParant = true;
+
+            SetContext(() => this._Context.Deleteable(childList).ExecuteCommand());
+        }
+
+        private void SetContext(Action action)
+        {
+            var key = "_DeleteNavTask";
+            if (this._Context.TempItems == null)
+            {
+                this._Context.TempItems = new Dictionary<string, object>();
+            }
+            if (!this._Context.TempItems.ContainsKey(key))
+            {
+                this._Context.TempItems.Add(key, null);
+            }
+            var oldTask = this._Context.TempItems[key];
+            var newTask = new List<Action>();
+            if (oldTask != null)
+            {
+                newTask = (List<Action>)oldTask;
+            }
+            newTask.Add(action);
+            this._Context.TempItems[key] = newTask;
+        }
+
+        private EntityColumnInfo GetParentPkColumn()
+        {
+            EntityColumnInfo parentPkColumn = _ParentPkColumn;
+            if (_ParentPkColumn == null)
+            {
+                parentPkColumn = _ParentPkColumn = this._ParentEntity.Columns.FirstOrDefault(it => it.IsPrimarykey);
+            }
+            return parentPkColumn;
+        }
+        private EntityColumnInfo GetParentPkNavColumn(EntityColumnInfo nav)
+        {
+            EntityColumnInfo result = null;
+            if (nav.Navigat.Name2.HasValue())
+            {
+                result = _ParentPkColumn = this._ParentEntity.Columns.FirstOrDefault(it => it.PropertyName == nav.Navigat.Name2);
+            }
+            return result;
         }
 
+        private EntityColumnInfo GetPkColumnByNav(EntityInfo entity, EntityColumnInfo nav)
+        {
+            var pkColumn = entity.Columns.FirstOrDefault(it => it.IsPrimarykey == true);
+            if (nav.Navigat.Name2.HasValue())
+            {
+                pkColumn = entity.Columns.FirstOrDefault(it => it.PropertyName == nav.Navigat.Name2);
+            }
+            return pkColumn;
+        }
+        private EntityColumnInfo GetFKColumnByNav(EntityInfo entity, EntityColumnInfo nav)
+        {
+            var fkColumn = entity.Columns.FirstOrDefault(it => it.PropertyName == nav.Navigat.Name);
+            return fkColumn;
+        }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavProvider.cs
index 626e351b6..f38d73254 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavProvider.cs
@@ -15,10 +15,12 @@ namespace SqlSugar
         public EntityInfo _ParentEntity { get; set; }
         public EntityColumnInfo _ParentPkColumn { get; set; }
         public SqlSugarProvider _Context { get; set; }
+        public bool _IsDeletedParant { get; set; }
 
-        public DeleteNavTask<Root, TChild> ThenInclude< TChild>(Expression<Func<Root, TChild>> expression)
+        public DeleteNavProvider<Root, TChild> ThenInclude< TChild>(Expression<Func<T, TChild>> expression)
             where TChild : class, new()
         {
+            InitParentList();
             var name = ExpressionTool.GetMemberName(expression);
             var nav = this._ParentEntity.Columns.FirstOrDefault(x => x.PropertyName == name);
             if (nav.Navigat == null)
@@ -37,13 +39,72 @@ namespace SqlSugar
             {
                 DeleteManyToMany<TChild>(name, nav);
             }
-            return null;
+            return GetResult<TChild>();
         }
 
-        public DeleteNavTask<Root, TChild> ThenInclude<TChild>(Expression<Func<Root, List<TChild>>> expression)
+        public DeleteNavProvider<Root, TChild> ThenInclude<TChild>(Expression<Func<T, List<TChild>>> expression)
          where TChild : class, new()
         {
-            throw new NotImplementedException();
+            InitParentList();
+            var name = ExpressionTool.GetMemberName(expression);
+            var nav = this._ParentEntity.Columns.FirstOrDefault(x => x.PropertyName == name);
+            if (nav.Navigat == null)
+            {
+                Check.ExceptionEasy($"{name} no navigate attribute", $"{this._ParentEntity.EntityName}的属性{name}没有导航属性");
+            }
+            if (nav.Navigat.NavigatType == NavigateType.OneToOne || nav.Navigat.NavigatType == NavigateType.ManyToOne)
+            {
+                DeleteOneToOne<TChild>(name, nav);
+            }
+            else if (nav.Navigat.NavigatType == NavigateType.OneToMany)
+            {
+                DeleteOneToMany<TChild>(name, nav);
+            }
+            else
+            {
+                DeleteManyToMany<TChild>(name, nav);
+            }
+            return GetResult<TChild>();
+        }
+        private DeleteNavProvider<Root, TChild> GetResult<TChild>() where TChild : class, new()
+        {
+            return new DeleteNavProvider<Root, TChild>()
+            {
+                _Context = this._Context,
+                _ParentEntity = this._ParentEntity,
+                _ParentList = this._ParentList,
+                _Roots = this._Roots,
+                _ParentPkColumn = this._ParentPkColumn,
+                _RootList = this._RootList,
+                _IsDeletedParant=this._IsDeletedParant
+            };
+        }
+        public DeleteNavProvider<Root, Root> AsNav()
+        {
+            return new DeleteNavProvider<Root, Root>
+            {
+                _Context = _Context,
+                _ParentEntity = null,
+                _ParentList = null,
+                _Roots = _Roots,
+                _IsDeletedParant = this._IsDeletedParant,
+                _ParentPkColumn = this._Context.EntityMaintenance.GetEntityInfo<Root>().Columns.First(it => it.IsPrimarykey)
+            };
+        }
+        private void InitParentList()
+        {
+            this._ParentEntity = this._Context.EntityMaintenance.GetEntityInfo<T>();
+            if (_RootList == null)
+            {
+                _RootList = _ParentList = _Roots.Cast<object>().ToList();
+            }
+            else if (_ParentList == null)
+            {
+                _ParentList = _RootList;
+                var pkColumn = this._Context.EntityMaintenance.GetEntityInfo<T>().Columns.FirstOrDefault(it => it.IsPrimarykey);
+                this._ParentPkColumn = pkColumn;
+            }
+
         }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavTask.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavTask.cs
index 1122b6508..d3433384c 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavTask.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavTask.cs
@@ -9,7 +9,7 @@ namespace SqlSugar
 {
     public class DeleteNavTaskInit<Root,T> where T : class, new() where Root : class, new()
     {
-        public List<T> Roots { get;   set; }
+        internal List<T> Roots { get;   set; }
         internal SqlSugarProvider Context { get; set; }
         internal DeleteNavProvider<Root, Root> deleteNavProvider { get; set; }
 
@@ -17,7 +17,7 @@ namespace SqlSugar
         {
             this.Context = deleteNavProvider._Context;
             DeleteNavTask<Root, TChild> result = new DeleteNavTask<Root, TChild>();
-            Func<DeleteNavTask<Root, TChild>> func = () => deleteNavProvider.ThenInclude(expression);
+            Func<DeleteNavProvider<Root, TChild>> func = () => deleteNavProvider.ThenInclude(expression);
             result.PreFunc = func;
             result.Context = this.Context;
             return result;
@@ -26,7 +26,7 @@ namespace SqlSugar
         {
             this.Context = deleteNavProvider._Context;
             DeleteNavTask<Root, TChild> result = new DeleteNavTask<Root, TChild>();
-            Func<DeleteNavTask<Root, TChild>> func = () => deleteNavProvider.ThenInclude(expression);
+            Func<DeleteNavProvider<Root, TChild>> func = () => deleteNavProvider.ThenInclude(expression);
             result.PreFunc = func;
             result.Context = this.Context;
             return result;
@@ -35,11 +35,11 @@ namespace SqlSugar
     public class DeleteNavTask<Root, T> where T : class, new() where Root : class, new()
     {
         public SqlSugarProvider Context { get; set; }
-        public Func<DeleteNavTask<Root, T>> PreFunc { get; set; }
+        public Func<DeleteNavProvider<Root, T>> PreFunc { get; set; }
         public DeleteNavTask<Root, TChild> ThenInclude<TChild>(Expression<Func<T, TChild>> expression) where TChild : class, new()
         {
             DeleteNavTask<Root, TChild> result = new DeleteNavTask<Root, TChild>();
-            Func<DeleteNavTask<Root, TChild>> func = () => PreFunc().ThenInclude(expression);
+            Func<DeleteNavProvider<Root, TChild>> func = () => PreFunc().ThenInclude(expression);
             result.PreFunc = func;
             result.Context = this.Context;
             return result;
@@ -47,7 +47,7 @@ namespace SqlSugar
         public DeleteNavTask<Root, TChild> ThenInclude<TChild>(Expression<Func<T, List<TChild>>> expression) where TChild : class, new()
         {
             DeleteNavTask<Root, TChild> result = new DeleteNavTask<Root, TChild>();
-            Func<DeleteNavTask<Root, TChild>> func = () => PreFunc().ThenInclude(expression);
+            Func<DeleteNavProvider<Root, TChild>> func = () => PreFunc().ThenInclude(expression);
             result.PreFunc = func;
             result.Context = this.Context;
             return result;
@@ -62,16 +62,19 @@ namespace SqlSugar
         }
         public bool ExecuteCommand()
         {
+            PreFunc();
+
             var hasTran = this.Context.Ado.Transaction != null;
             if (hasTran)
             {
-                PreFunc();
+                ExecTasks();
             }
             else
             {
                 this.Context.Ado.UseTran(() =>
                 {
-                    PreFunc();
+                    ExecTasks();
+
                 }, ex => throw ex);
             }
             return true;
@@ -89,10 +92,20 @@ namespace SqlSugar
         private DeleteNavTask<Root, Root> AsNav()
         {
             DeleteNavTask<Root, Root> result = new DeleteNavTask<Root, Root>();
-            Func<DeleteNavTask<Root, Root>> func = () => PreFunc().AsNav();
+            Func<DeleteNavProvider<Root, Root>> func = () => PreFunc().AsNav();
             result.PreFunc = func;
             result.Context = this.Context;
             return result;
         }
+        private void ExecTasks() 
+        {
+            var tasks=(List<Action>)this.Context.TempItems["_DeleteNavTask"];
+            tasks.Reverse();
+            foreach (var task in tasks) 
+            {
+                task();
+            }
+            this.Context.TempItems.Remove("_DeleteNavTask");
+        }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs
index bfc15ecba..bcec7d82e 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs
@@ -910,8 +910,9 @@ namespace SqlSugar
         public DeleteNavTaskInit<T, T> DeleteNav<T>(List<T> datas) where T : class, new()
         {
             var result = new DeleteNavTaskInit<T, T>();
-            result.Roots = datas;
-            result.Context = this;
+            result.deleteNavProvider = new DeleteNavProvider<T, T>();
+            result.deleteNavProvider._Roots = datas;
+            result.deleteNavProvider._Context = this;
             return result;
         }
         public DeleteNavTaskInit<T, T> DeleteNav<T>(Expression<Func<T, bool>> whereExpression) where T : class, new()