diff --git a/packages/abc/let/index.en-US.md b/packages/abc/let/index.en-US.md
index 5b9cc8a27..57c3b42b4 100644
--- a/packages/abc/let/index.en-US.md
+++ b/packages/abc/let/index.en-US.md
@@ -5,8 +5,11 @@ title: let
 subtitle: Let
 cols: 1
 module: import { LetModule } from '@delon/abc/let';
+deprecated: 19.0.0
 ---
 
+# Will be removed in v19, Please use `@let` instead.
+
 Allows to reuse computed value in several places in template to avoid recalculations of getters or many `async` pipes.
 
 ```html
diff --git a/packages/abc/let/index.zh-CN.md b/packages/abc/let/index.zh-CN.md
index 2aa7ed08d..e8be7def7 100644
--- a/packages/abc/let/index.zh-CN.md
+++ b/packages/abc/let/index.zh-CN.md
@@ -5,8 +5,11 @@ title: let
 subtitle: 定义
 cols: 1
 module: import { LetModule } from '@delon/abc/let';
+deprecated: 19.0.0
 ---
 
+# Will be removed in v19, Please use `@let` instead.
+
 允许在模板内复用计算值（包含异步），避免重复重新计算。
 
 ```html
diff --git a/packages/abc/let/let.directive.ts b/packages/abc/let/let.directive.ts
index 24e72a079..54f7337a0 100644
--- a/packages/abc/let/let.directive.ts
+++ b/packages/abc/let/let.directive.ts
@@ -14,6 +14,9 @@ export class LetContext<T> {
   }
 }
 
+/**
+ * @deprecated Will be removed in v19, Please use `@let` instead.
+ */
 @Directive({ selector: '[let]', standalone: true })
 export class LetDirective<T> {
   @Input({ required: true }) let!: T;
diff --git a/packages/abc/let/let.module.ts b/packages/abc/let/let.module.ts
index b9199e5f0..8c841b19d 100644
--- a/packages/abc/let/let.module.ts
+++ b/packages/abc/let/let.module.ts
@@ -4,6 +4,9 @@ import { LetDirective } from './let.directive';
 
 const DIRECTIVES = [LetDirective];
 
+/**
+ * @deprecated Will be removed in v19, Please use `@let` instead.
+ */
 @NgModule({
   imports: DIRECTIVES,
   exports: DIRECTIVES