diff --git a/src/components/slider/README.md b/src/components/slider/README.md
index b949e99..1b96b6b 100644
--- a/src/components/slider/README.md
+++ b/src/components/slider/README.md
@@ -14,8 +14,10 @@
 ```
 
 2. `cover` --- 初始填充<br>
-   `cover="50"` 和 `cover="50%"`都表示初始填充音量条的50%<br>
-   `cover="150px"` 表示准确的填充长度<br>
+   `cover="50"` 和 `cover="50%"` 都表示初始填充音量条的50%<br>
+   `cover="78.2"` 和 `cover="78.2%"` 都表示初始填充音量条的78.2%<br>
+   `cover="150px"` 和 `cover="113.5px"` 表示准确的填充长度<br>
+
 
 ```
 <star-slider cover="150px"></star-slider>
diff --git a/src/components/slider/slider.ts b/src/components/slider/slider.ts
index fde930b..1ad0037 100644
--- a/src/components/slider/slider.ts
+++ b/src/components/slider/slider.ts
@@ -3,9 +3,9 @@ import {customElement, property, query} from 'lit/decorators.js'
 import {sharedStyles} from './slider-styles.js'
 
 function getType(str: string) {
-  if (/^\d*px$/.test(str)) {
+  if (/^\d*(\.\d*)?px$/.test(str)) {
     return 'static'
-  } else if (/^\d*%?$/.test(str)) {
+  } else if (/^\d*(\.\d*)?%?$/.test(str)) {
     return 'percent'
   } else {
     return 'invalid'