diff --git a/packages/abc/let/demo/async.md b/packages/abc/let/demo/async.md
deleted file mode 100644
index 32dbe51d8..000000000
--- a/packages/abc/let/demo/async.md
+++ /dev/null
@@ -1,49 +0,0 @@
----
-title:
-  zh-CN: 异步
-  en-US: async
-order: 2
----
-
-## zh-CN
-
-一次订阅多次使用。
-
-## en-US
-
-One subscription and multiple use.
-
-```ts
-import { Platform } from '@angular/cdk/platform';
-import { AsyncPipe } from '@angular/common';
-import { ChangeDetectionStrategy, Component } from '@angular/core';
-import { interval, startWith } from 'rxjs';
-
-import { LetDirective } from '@delon/abc/let';
-import type { NzSafeAny } from 'ng-zorro-antd/core/types';
-
-@Component({
-  selector: 'app-demo',
-  template: `
-    @if (timer$ !== null) {
-      <ng-container *let="timer$ | async as time">
-        <p>Timer value: {{ time }}</p>
-        <p>Timer value: {{ time }}</p>
-        <p>Timer value: {{ time }}</p>
-      </ng-container>
-    }
-  `,
-  changeDetection: ChangeDetectionStrategy.OnPush,
-  standalone: true,
-  imports: [LetDirective, AsyncPipe]
-})
-export class DemoComponent {
-  timer$: NzSafeAny | null = null;
-
-  constructor(platform: Platform) {
-    if (!platform.isBrowser) return;
-
-    this.timer$ = interval(1000).pipe(startWith(0));
-  }
-}
-```
diff --git a/packages/abc/let/demo/simple.md b/packages/abc/let/demo/simple.md
deleted file mode 100644
index 026e8ca3e..000000000
--- a/packages/abc/let/demo/simple.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title:
-  zh-CN: 基础样例
-  en-US: Basic Usage
-order: 1
----
-
-## zh-CN
-
-最简单的用法。
-
-## en-US
-
-Simplest of usage.
-
-```ts
-import { ChangeDetectionStrategy, Component } from '@angular/core';
-
-import { LetDirective } from '@delon/abc/let';
-import { NzButtonModule } from 'ng-zorro-antd/button';
-
-@Component({
-  selector: 'app-demo',
-  template: `
-    <p>v1 (use *let directive) called count: {{ v1Count }}; v2 called count: {{ v2Count }};</p>
-    <div *let="value1 as v">
-      <p>{{ v }}</p>
-      <p>{{ v }}</p>
-    </div>
-    <p>{{ value2 }}</p>
-    <p>{{ value2 }}</p>
-    <button nz-button (click)="update()">Random Value</button>
-  `,
-  changeDetection: ChangeDetectionStrategy.OnPush,
-  standalone: true,
-  imports: [LetDirective, NzButtonModule]
-})
-export class DemoComponent {
-  v1Count = 0;
-  v2Count = 0;
-  v1 = 'v1';
-  v2 = 'v2';
-
-  get value1(): string {
-    ++this.v1Count;
-    return this.v1;
-  }
-
-  get value2(): string {
-    ++this.v2Count;
-    return this.v2;
-  }
-
-  update(): void {
-    this.v1 = `v1-${Math.random()}`;
-    this.v2 = `v2-${Math.random()}`;
-  }
-}
-```
diff --git a/packages/abc/let/index.en-US.md b/packages/abc/let/index.en-US.md
deleted file mode 100644
index 57c3b42b4..000000000
--- a/packages/abc/let/index.en-US.md
+++ /dev/null
@@ -1,30 +0,0 @@
----
-type: Basic
-order: 1
-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
-<div *let="value1 as v">
-  <p>{{ v }}</p>
-</div>
-<div *let="time$ | async as time">
-  <p>{{ time }}</p>
-</div>
-```
-
-## API
-
-### [let]:standalone
-
-| Property | Description | Type | Default | Global Config |
-|----------|-------------|------|---------|---------------|
-| `[let]` | Expression | `T` | - | - |
diff --git a/packages/abc/let/index.ts b/packages/abc/let/index.ts
deleted file mode 100644
index 44e69d0d1..000000000
--- a/packages/abc/let/index.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export * from './let.directive';
-export * from './let.module';
diff --git a/packages/abc/let/index.zh-CN.md b/packages/abc/let/index.zh-CN.md
deleted file mode 100644
index e8be7def7..000000000
--- a/packages/abc/let/index.zh-CN.md
+++ /dev/null
@@ -1,30 +0,0 @@
----
-type: Basic
-order: 1
-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
-<div *let="value1 as v">
-  <p>{{ v }}</p>
-</div>
-<div *let="time$ | async as time">
-  <p>{{ time }}</p>
-</div>
-```
-
-## API
-
-### [let]:standalone
-
-| 参数 | 说明 | 类型 | 默认值 | 全局配置 |
-|----|----|----|-----|------|
-| `[let]` | 表达式 | `T` | - | - |
diff --git a/packages/abc/let/let.directive.ts b/packages/abc/let/let.directive.ts
deleted file mode 100644
index 54f7337a0..000000000
--- a/packages/abc/let/let.directive.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { Directive, Inject, Input, TemplateRef, ViewContainerRef } from '@angular/core';
-
-import type { NzSafeAny } from 'ng-zorro-antd/core/types';
-
-export class LetContext<T> {
-  constructor(private readonly dir: LetDirective<T>) {}
-
-  get $implicit(): T {
-    return this.dir.let;
-  }
-
-  get let(): T {
-    return this.dir.let;
-  }
-}
-
-/**
- * @deprecated Will be removed in v19, Please use `@let` instead.
- */
-@Directive({ selector: '[let]', standalone: true })
-export class LetDirective<T> {
-  @Input({ required: true }) let!: T;
-
-  constructor(@Inject(ViewContainerRef) vc: ViewContainerRef, @Inject(TemplateRef) ref: TemplateRef<LetContext<T>>) {
-    vc.createEmbeddedView(ref, new LetContext<T>(this));
-  }
-
-  static ngTemplateContextGuard<T>(_dir: LetDirective<T>, _ctx: NzSafeAny): _ctx is LetDirective<T> {
-    return true;
-  }
-}
diff --git a/packages/abc/let/let.module.ts b/packages/abc/let/let.module.ts
deleted file mode 100644
index 8c841b19d..000000000
--- a/packages/abc/let/let.module.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { NgModule } from '@angular/core';
-
-import { LetDirective } from './let.directive';
-
-const DIRECTIVES = [LetDirective];
-
-/**
- * @deprecated Will be removed in v19, Please use `@let` instead.
- */
-@NgModule({
-  imports: DIRECTIVES,
-  exports: DIRECTIVES
-})
-export class LetModule {}
diff --git a/packages/abc/let/let.spec.ts b/packages/abc/let/let.spec.ts
deleted file mode 100644
index 23edf99b3..000000000
--- a/packages/abc/let/let.spec.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-import { Component, DebugElement } from '@angular/core';
-import { ComponentFixture } from '@angular/core/testing';
-import { By } from '@angular/platform-browser';
-
-import { createTestContext } from '@delon/testing';
-
-import { LetDirective } from './let.directive';
-
-describe('abc: let', () => {
-  let fixture: ComponentFixture<TestComponent>;
-  let dl: DebugElement;
-
-  beforeEach(() => {
-    ({ fixture, dl } = createTestContext(TestComponent));
-    fixture.detectChanges();
-  });
-
-  function getValue(): string {
-    return (dl.query(By.css('.value')).nativeElement as HTMLElement).textContent!.trim();
-  }
-
-  it('should be working', () => {
-    expect(getValue()).toContain(`aaa`);
-  });
-});
-
-@Component({
-  template: ` <div *let="getter as value" class="value">{{ value }}{{ value }}{{ value }}</div> `,
-  imports: [LetDirective]
-})
-class TestComponent {
-  counter = 0;
-
-  get getter(): string {
-    this.counter++;
-
-    return 'a';
-  }
-}
diff --git a/packages/abc/let/ng-package.json b/packages/abc/let/ng-package.json
deleted file mode 100644
index 9c677523c..000000000
--- a/packages/abc/let/ng-package.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "lib": {
-    "flatModuleFile": "let",
-    "entryFile": "index.ts"
-  }
-}
diff --git a/scripts/site/route-paths.txt b/scripts/site/route-paths.txt
index cefb45317..78246ee2b 100644
--- a/scripts/site/route-paths.txt
+++ b/scripts/site/route-paths.txt
@@ -101,8 +101,6 @@
 /components/highlight/zh
 /components/hotkey/en
 /components/hotkey/zh
-/components/let/en
-/components/let/zh
 /components/loading/en
 /components/loading/zh
 /components/lodop/en
@@ -344,4 +342,4 @@
 /util/pipes-format/en
 /util/pipes-format/zh
 /util/token/en
-/util/token/zh
\ No newline at end of file
+/util/token/zh