diff --git a/src/area/README.md b/src/area/README.md
index 9c10fdb57..4a60b074b 100644
--- a/src/area/README.md
+++ b/src/area/README.md
@@ -64,7 +64,7 @@ To have a selected value,simply pass the `code` of target area to `value` prop
| area-list | Area list data | _object_ | - |
| columns-placeholder `v2.2.5` | Placeholder of columns | _string[]_ | `[]` |
| loading | Whether to show loading prompt | _boolean_ | `false` |
-| item-height `v2.8.6` | Option height, supports `px` ans `rem` unit, default `px` | _number \| string_ | `44` |
+| item-height `v2.8.6` | Option height, supports `px` `vw` `rem` unit, default `px` | _number \| string_ | `44` |
| columns-num | Level of picker | _number \| string_ | `3` |
| visible-item-count | Count of visible columns | _number \| string_ | `5` |
| swipe-duration `v2.2.13` | Duration of the momentum animation,unit `ms` | _number \| string_ | `1000` |
diff --git a/src/area/README.zh-CN.md b/src/area/README.zh-CN.md
index 71f8367e5..0de44a86a 100644
--- a/src/area/README.zh-CN.md
+++ b/src/area/README.zh-CN.md
@@ -64,7 +64,7 @@ Vue.use(Area);
| area-list | 省市区数据,格式见下方 | _object_ | - |
| columns-placeholder `v2.2.5` | 列占位提示文字 | _string[]_ | `[]` |
| loading | 是否显示加载状态 | _boolean_ | `false` |
-| item-height `v2.8.6` | 选项高度,支持 `px` 和 `rem` 单位,默认 `px` | _number \| string_ | `44` |
+| item-height `v2.8.6` | 选项高度,支持 `px` `vw` `rem` 单位,默认 `px` | _number \| string_ | `44` |
| columns-num | 显示列数,3-省市区,2-省市,1-省 | _number \| string_ | `3` |
| visible-item-count | 可见的选项个数 | _number \| string_ | `5` |
| swipe-duration `v2.2.13` | 快速滑动时惯性滚动的时长,单位`ms` | _number \| string_ | `1000` |
diff --git a/src/datetime-picker/README.md b/src/datetime-picker/README.md
index bd27f1e51..3293d5e20 100644
--- a/src/datetime-picker/README.md
+++ b/src/datetime-picker/README.md
@@ -259,7 +259,7 @@ export default {
| filter | Option filter | _(type, vals) => vals_ | - |
| formatter | Option text formatter | _(type, val) => val_ | - |
| columns-order `v2.9.2` | Array for ordering columns, where item can be set to
`year`, `month`, `day`, `hour` and `minute` | _string[]_ | - |
-| item-height `v2.8.6` | Option height, supports `px` ans `rem` unit, default `px` | _number \| string_ | `44` |
+| item-height `v2.8.6` | Option height, supports `px` `vw` `rem` unit, default `px` | _number \| string_ | `44` |
| visible-item-count | Count of visible columns | _number \| string_ | `5` |
| swipe-duration `v2.2.13` | Duration of the momentum animation,unit `ms` | _number \| string_ | `1000` |
diff --git a/src/datetime-picker/README.zh-CN.md b/src/datetime-picker/README.zh-CN.md
index 22f7d54f8..f7a39741a 100644
--- a/src/datetime-picker/README.zh-CN.md
+++ b/src/datetime-picker/README.zh-CN.md
@@ -268,7 +268,7 @@ export default {
| filter | 选项过滤函数 | _(type, vals) => vals_ | - |
| formatter | 选项格式化函数 | _(type, val) => val_ | - |
| columns-order `v2.9.2` | 自定义列排序数组, 子项可选值为
`year`、`month`、`day`、`hour`、`minute` | _string[]_ | - |
-| item-height `v2.8.6` | 选项高度,支持 `px` 和 `rem` 单位,默认 `px` | _number \| string_ | `44` |
+| item-height `v2.8.6` | 选项高度,支持 `px` `vw` `rem` 单位,默认 `px` | _number \| string_ | `44` |
| visible-item-count | 可见的选项个数 | _number \| string_ | `5` |
| swipe-duration `v2.2.13` | 快速滑动时惯性滚动的时长,单位`ms` | _number \| string_ | `1000` |
diff --git a/src/picker/README.md b/src/picker/README.md
index a2654b023..d6da938eb 100644
--- a/src/picker/README.md
+++ b/src/picker/README.md
@@ -252,7 +252,7 @@ export default {
| show-toolbar | Whether to show toolbar | _boolean_ | `false` |
| allow-html `v2.1.8` | Whether to allow HTML in option text | _boolean_ | `true` |
| default-index | Default value index of single column picker | _number \| string_ | `0` |
-| item-height `v2.8.6` | Option height, supports `px` ans `rem` unit, default `px` | _number \| string_ | `44` |
+| item-height `v2.8.6` | Option height, supports `px` `vw` `rem` unit, default `px` | _number \| string_ | `44` |
| visible-item-count | Count of visible columns | _number \| string_ | `5` |
| swipe-duration `v2.2.10` | Duration of the momentum animation,unit `ms` | _number \| string_ | `1000` |
diff --git a/src/picker/README.zh-CN.md b/src/picker/README.zh-CN.md
index 9d0fdad33..8ba6d01a5 100644
--- a/src/picker/README.zh-CN.md
+++ b/src/picker/README.zh-CN.md
@@ -275,7 +275,7 @@ export default {
| show-toolbar | 是否显示顶部栏 | _boolean_ | `false` |
| allow-html `v2.1.8` | 是否允许选项内容中渲染 HTML | _boolean_ | `true` |
| default-index | 单列选择时,默认选中项的索引 | _number \| string_ | `0` |
-| item-height `v2.8.6` | 选项高度,支持 `px` 和 `rem` 单位,默认 `px` | _number \| string_ | `44` |
+| item-height `v2.8.6` | 选项高度,支持 `px` `vw` `rem` 单位,默认 `px` | _number \| string_ | `44` |
| visible-item-count | 可见的选项个数 | _number \| string_ | `5` |
| swipe-duration `v2.2.10` | 快速滑动时惯性滚动的时长,单位 `ms` | _number \| string_ | `1000` |
diff --git a/src/sticky/README.md b/src/sticky/README.md
index fcb804a05..17ce81ccd 100644
--- a/src/sticky/README.md
+++ b/src/sticky/README.md
@@ -56,7 +56,7 @@ export default {
| Attribute | Description | Type | Default |
| --- | --- | --- | --- |
-| offset-top `v2.8.7` | Offset top, supports `px` ans `rem` unit, default `px` | _number \| string_ | `0` |
+| offset-top `v2.8.7` | Offset top, supports `px` `vw` `rem` unit, default `px` | _number \| string_ | `0` |
| z-index | z-index when sticky | _number \| string_ | `99` |
| container | Container DOM | _Element_ | - |
diff --git a/src/sticky/README.zh-CN.md b/src/sticky/README.zh-CN.md
index e26650d6f..696d07055 100644
--- a/src/sticky/README.zh-CN.md
+++ b/src/sticky/README.zh-CN.md
@@ -66,7 +66,7 @@ export default {
| 参数 | 说明 | 类型 | 默认值 |
| --- | --- | --- | --- |
-| offset-top `v2.8.7` | 吸顶时与顶部的距离,支持 `px` 和 `rem` 单位,默认 `px` | _number \| string_ | `0` |
+| offset-top `v2.8.7` | 吸顶时与顶部的距离,支持 `px` `vw` `rem` 单位,默认 `px` | _number \| string_ | `0` |
| z-index | 吸顶时的 z-index | _number \| string_ | `99` |
| container | 容器对应的 HTML 节点 | _Element_ | - |
diff --git a/src/sticky/test/__snapshots__/index.spec.js.snap b/src/sticky/test/__snapshots__/index.spec.js.snap
index be6374a1d..fbfac5d00 100644
--- a/src/sticky/test/__snapshots__/index.spec.js.snap
+++ b/src/sticky/test/__snapshots__/index.spec.js.snap
@@ -36,6 +36,14 @@ exports[`offset-top with rem unit 1`] = `
`;
+exports[`offset-top with vw unit 1`] = `
+