diff --git a/.ua/index.json b/.ua/index.json
index 8ff7e1f..268c385 100644
--- a/.ua/index.json
+++ b/.ua/index.json
@@ -1,6 +1,6 @@
 {
   "$schema": "ui-arch-registry-index/0.1",
-  "generatedAt": "2026-10-26T11:17:54.464Z",
+  "generatedAt": "2026-10-26T11:20:15.456Z",
   "repoRoot": ".",
   "packages": [
     {
@@ -3132,6 +3132,11 @@
                 "n": "onChange",
                 "t": "(values: string[]) => void",
                 "d": "变更回调（传副本）"
+              },
+              {
+                "n": "clearable",
+                "t": "boolean",
+                "d": "开启后有选中值时在右缘显示一键清空按钮；缺省不渲染"
               }
             ],
             "example": "multiSelect({ value: tagPick, max: 3, placeholder: '选择技术栈', options: [{ value: 'ts', label: 'TypeScript' }, { value: 'css', label: 'CSS 令牌' }] })",
diff --git a/llms-full.txt b/llms-full.txt
index 6737ac1..1fd58dc 100644
--- a/llms-full.txt
+++ b/llms-full.txt
@@ -1,6 +1,6 @@
 # @ui-arch 组件库 Agent 文档（无图形版）
 
-> 自动生成于 2026-10-26T11:17:54.464Z，数据源：各包 ua.manifest.json，勿手改。人类版文档站：apps/docs/index.html。
+> 自动生成于 2026-10-26T11:20:15.456Z，数据源：各包 ua.manifest.json，勿手改。人类版文档站：apps/docs/index.html。
 > 组件 = 普通函数，传 props 返回 DOM；状态用 signal 双向绑定：读 signal() 写 signal(v)。
 
 ## 快速上手
@@ -1629,6 +1629,7 @@ affix({ offset: 8 }, card({ title: '滚动时我会贴顶' }, h('p', null, '正
 - searchable：boolean —— 是否可输入过滤；缺省 true
 - disabled：boolean | Signal<boolean> —— 禁用整个下拉
 - onChange：(values: string[]) => void —— 变更回调（传副本）
+- clearable：boolean —— 开启后有选中值时在右缘显示一键清空按钮；缺省不渲染
 
 示例：
 
diff --git a/packages/skin/ui/src/multiSelect.ts b/packages/skin/ui/src/multiSelect.ts
index 6d45456..2e2aa12 100644
--- a/packages/skin/ui/src/multiSelect.ts
+++ b/packages/skin/ui/src/multiSelect.ts
@@ -54,7 +54,9 @@ export function multiSelect(props: MultiSelectProps): HTMLElement {
   box.append(tagWrap, input); // 标签区在前、输入框在后，横向排布
   const list = h('ul', { class: 'ua-multiselect-list', role: 'listbox', 'aria-multiselectable': 'true' }) as HTMLElement;
   const pop = h('div', { class: () => `ua-multiselect-pop${open() ? ' ua-open' : ''}${place() === 'top' ? ' is-flip' : ''}` }, list) as HTMLElement;
-  const root = h('div', { class: () => `ua-multiselect${open() ? ' ua-open' : ''}` }, box, pop) as HTMLElement;
+  const clearBtn = h('button', { type: 'button', class: 'ua-select-clear', 'aria-label': '清空所选', hidden: true, onClick: (e: Event) => { e.stopPropagation(); update([]); input.focus(); } }, '×') as HTMLElement; // 复用 select 清空钮样式；阻止冒泡免得清完又展开
+  const root = h('div', { class: () => `ua-multiselect${open() ? ' ua-open' : ''}` }, box, props.clearable ? clearBtn : null, pop) as HTMLElement;
+  effect(() => { clearBtn.hidden = !value().length; }); // 有值才显示（clearable 未开时按钮根本不挂载）
 
   /*** 重绘标签区与候选：标签带删除钮，候选带勾选态与禁用态 ***/
   const render = (): void => {
diff --git a/packages/skin/ui/src/types.ts b/packages/skin/ui/src/types.ts
index cf267a9..113cad8 100644
--- a/packages/skin/ui/src/types.ts
+++ b/packages/skin/ui/src/types.ts
@@ -732,6 +732,7 @@ export interface MultiSelectProps {
   max?: number;                           // 最多选几项：到上限后未选项禁用
   maxTagCount?: number;                   // 标签区最多显示几个，超出折成「+N」；缺省全显示
   searchable?: boolean;                   // 是否可输入过滤；缺省 true
+  clearable?: boolean;                    // 开启后有选中值时显示一键清空按钮；缺省不渲染
   disabled?: boolean | Signal<boolean>;   // 禁用整个下拉
   onChange?: (values: string[]) => void;  // 变更回调（传副本）
 }
diff --git a/packages/skin/ui/ua.manifest.json b/packages/skin/ui/ua.manifest.json
index e584b96..205d78d 100644
--- a/packages/skin/ui/ua.manifest.json
+++ b/packages/skin/ui/ua.manifest.json
@@ -3003,6 +3003,11 @@
             "n": "onChange",
             "t": "(values: string[]) => void",
             "d": "变更回调（传副本）"
+          },
+          {
+            "n": "clearable",
+            "t": "boolean",
+            "d": "开启后有选中值时在右缘显示一键清空按钮；缺省不渲染"
           }
         ],
         "example": "multiSelect({ value: tagPick, max: 3, placeholder: '选择技术栈', options: [{ value: 'ts', label: 'TypeScript' }, { value: 'css', label: 'CSS 令牌' }] })",
diff --git a/packages/skin/ui/ui.css b/packages/skin/ui/ui.css
index 3920a5a..0cbc3c2 100644
--- a/packages/skin/ui/ui.css
+++ b/packages/skin/ui/ui.css
@@ -3875,6 +3875,10 @@ button.ua-step-dot:hover {
   display: inline-block;
   min-width: 240px;
 }
+/* 多选清空钮：复用 select 清空钮样式，右缘内收一档贴合标签区（select 的 24px 是给箭头让位） */
+.ua-multiselect .ua-select-clear {
+  right: var(--ua-space-2);
+}
 .ua-multiselect-box {
   display: flex;
   flex-wrap: wrap;