diff --git a/src/count-down/README.md b/src/count-down/README.md
index 25efe539e..aad50c501 100644
--- a/src/count-down/README.md
+++ b/src/count-down/README.md
@@ -108,7 +108,7 @@ export default {
 
 | Attribute | Description | Type | Default |
 |------|------|------|------|
-| time | Total time | *number* | - |
+| time | Total time | *number \| string* | `0` |
 | format | Time format | *string* | `HH:mm:ss` |
 | auto-start | Whether to auto start count down | *boolean* | `true` |
 | millisecond | Whether to enable millisecond render | *boolean* | `false` |
diff --git a/src/count-down/README.zh-CN.md b/src/count-down/README.zh-CN.md
index 8e52e2a64..d1ea48cb7 100644
--- a/src/count-down/README.zh-CN.md
+++ b/src/count-down/README.zh-CN.md
@@ -118,7 +118,7 @@ export default {
 
 | 参数 | 说明 | 类型 | 默认值 |
 |------|------|------|------|
-| time | 倒计时时长，单位毫秒 | *number* | - |
+| time | 倒计时时长，单位毫秒 | *number \| string* | `0` |
 | format | 时间格式 | *string* | `HH:mm:ss` |
 | auto-start | 是否自动开始倒计时 | *boolean* | `true` |
 | millisecond | 是否开启毫秒级渲染 | *boolean* | `false` |
diff --git a/src/count-down/index.js b/src/count-down/index.js
index 609952674..c13d36779 100644
--- a/src/count-down/index.js
+++ b/src/count-down/index.js
@@ -8,7 +8,7 @@ export default createComponent({
   props: {
     millisecond: Boolean,
     time: {
-      type: Number,
+      type: [Number, String],
       default: 0,
     },
     format: {
@@ -84,7 +84,7 @@ export default createComponent({
     // @exposed-api
     reset() {
       this.pause();
-      this.remain = this.time;
+      this.remain = +this.time;
 
       if (this.autoStart) {
         this.start();