diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavOneToMany.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavOneToMany.cs
index 200e41dbd..4a3052162 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavOneToMany.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavOneToMany.cs
@@ -42,6 +42,10 @@ namespace SqlSugar
                     children.AddRange(childs);
                 }
                 ids.Add(parentValue);
+                if (_Options?.OneToManyNoDeleteNull == true && childs == null) 
+                {
+                    ids.Remove(parentValue);
+                }
             }
             if (NotAny(name))
             {
diff --git a/Src/Asp.Net/SqlSugar/Entities/DeleteNavOptions.cs b/Src/Asp.Net/SqlSugar/Entities/DeleteNavOptions.cs
index 331864007..954dbb606 100644
--- a/Src/Asp.Net/SqlSugar/Entities/DeleteNavOptions.cs
+++ b/Src/Asp.Net/SqlSugar/Entities/DeleteNavOptions.cs
@@ -49,6 +49,7 @@ namespace SqlSugar
         public bool ManyToManyEnableLogicDelete { get; set; }
         public bool OneToManyDeleteAll { get;  set; }
         public bool OneToManyEnableLogicDelete { get; set; }
+        public bool OneToManyNoDeleteNull { get; set; }
         public Expression RootFunc { get; set; }
         public Expression CurrentFunc { get; set; }
     }