diff --git a/Readme.md b/Readme.md
index ed57d01..4c6f2cc 100644
--- a/Readme.md
+++ b/Readme.md
@@ -79,6 +79,10 @@ kb.on(['ctrl + c', 'ctrl + v'], ev => {
 > 销毁整个键盘监听。
 
 
++ .finally(callback`<Function>`)
+> 类似Promise.finally, 只要有按键被按下(除了纯辅助功能键外), 都会触发回调.
+
+
 ### 键名对照表
 > 键名不区别大小写, 内部统一转为小写。
 
diff --git a/package.json b/package.json
index 3c3578b..5638b9b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bytedo/keyboard",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "支持各种按钮组合。原生js开发, 无任何依赖(不到2KB)。使用也非常简单。",
   "main": "dist/index.js",
   "repository": {
diff --git a/src/index.es7 b/src/index.es7
index ba33d7c..bee0bf2 100644
--- a/src/index.es7
+++ b/src/index.es7
@@ -49,8 +49,10 @@ function check(ev) {
 export default class Keyboard {
   constructor(elem) {
     this.$elem = elem
+
     hide(this, '__EVENTS__', {})
     hide(this, 'paused', false)
+    hide(this, '__finally__', null)
 
     hide(
       this,
@@ -112,6 +114,10 @@ export default class Keyboard {
             break
           }
         }
+
+        if (this.__finally__) {
+          this.__finally__(ev)
+        }
       })
     )
   }
@@ -287,4 +293,10 @@ export default class Keyboard {
       }
     }
   }
+
+  finally(callback) {
+    if (typeof callback === 'function') {
+      this.__finally__ = callback
+    }
+  }
 }