diff --git a/src/tab/README.md b/src/tab/README.md
index 98e48b913..ef80688fb 100644
--- a/src/tab/README.md
+++ b/src/tab/README.md
@@ -205,7 +205,7 @@ In scrollspy mode, the list of content will be tiled
 | swipeable | Whether to switch tabs with swipe gestrue in the content | _boolean_ | `false` |
 | lazy-render | Whether to enable tab content lazy render | _boolean_ | `true` |
 | scrollspy `v2.3.0` | Whether to use scrollspy mode | _boolean_ | `false` |
-| offset-top | Offset top when use sticky mode | _number \| string_ | `0` |
+| offset-top `v2.8.7` | Sticky offset top , supports `px` ans `rem` unit, default `px` | _number \| string_ | `0` |
 | swipe-threshold | Set swipe tabs threshold | _number \| string_ | `4` | - |
 | title-active-color | Title active color | _string_ | - |
 | title-inactive-color | Title inactive color | _string_ | - |
diff --git a/src/tab/README.zh-CN.md b/src/tab/README.zh-CN.md
index d7601af9e..db16f8397 100644
--- a/src/tab/README.zh-CN.md
+++ b/src/tab/README.zh-CN.md
@@ -209,7 +209,7 @@ export default {
 | swipeable | 是否开启手势滑动切换 | _boolean_ | `false` |
 | lazy-render | 是否开启延迟渲染（首次切换到标签时才触发内容渲染） | _boolean_ | `true` |
 | scrollspy `v2.3.0` | 是否开启滚动导航 | _boolean_ | `false` |
-| offset-top | 粘性定位布局下与顶部的最小距离，单位`px` | _number \| string_ | `0` |
+| offset-top `v2.8.7` | 粘性定位布局下与顶部的最小距离，支持 `px` 和 `rem` 单位，默认 `px` | _number \| string_ | `0` |
 | swipe-threshold | 滚动阈值，标签数量超过阈值时开始横向滚动 | _number \| string_ | `4` |
 | title-active-color | 标题选中态颜色 | _string_ | - |
 | title-inactive-color | 标题默认态颜色 | _string_ | - |