diff --git a/components/date-picker/README.en-US.md b/components/date-picker/README.en-US.md
index 81149146a..8166baf8d 100644
--- a/components/date-picker/README.en-US.md
+++ b/components/date-picker/README.en-US.md
@@ -31,7 +31,7 @@ Vue.component(DatePicker.name, DatePicker)
|text-render|customized option for text displaying|Function(typeFormat, column0Value, column1Value, ...): String|-|`unit-text` is invalid when using `text-render`, refer to `Appendix`|
|today-text|displaying text of today|String|`today`|use `&` to take placeholder date, like `&(today)`|
|line-height|line height of options|Number|`45`|unit `px`|
-|keep-index|keep last stop position when the column data changes|Boolean|`false`|-|
+|keep-index 2.5.2+|keep last stop position when the column data changes|Boolean|`false`|-|
|is-view|inline-display in page, otherwise it shows as `Popup`|Boolean|`false`|-|
|title|title of date-picker|String|-|-|
|describe|description of date-picker|String|-|-|
diff --git a/components/date-picker/README.md b/components/date-picker/README.md
index a107eefff..f08373f36 100644
--- a/components/date-picker/README.md
+++ b/components/date-picker/README.md
@@ -31,7 +31,7 @@ Vue.component(DatePicker.name, DatePicker)
|text-render|自定义选项展示文案方法|Function(typeFormat, column0Value, column1Value, ...): String|-|如果使用`text-render`则`unit-text`无效, 示例见附录|
|today-text|今天展示文案设置|String|`今天`|使用`&`可占位日期数字,如`&(今天)`|
|line-height|选择器选项行高|Number|`45`|单位`px`|
-|keep-index|当列数据变化时保持上次停留的位置|Boolean|`false`|-|
+|keep-index 2.5.2+|当列数据变化时保持上次停留的位置|Boolean|`false`|-|
|is-view|是否内嵌在页面内展示, 否则以弹层形式|Boolean|`false`|-|
|title|选择器标题|String|-|-|
|describe|选择器描述|String|-|-|
diff --git a/components/picker/README.en-US.md b/components/picker/README.en-US.md
index 067a86e1b..3063f41f6 100644
--- a/components/picker/README.en-US.md
+++ b/components/picker/README.en-US.md
@@ -29,7 +29,7 @@ Vue.component(Picker.name, Picker)
|invalid-index|indexes of disabled items in each column|Array|`[]`|array of multiple disabled items, such as `[[1,2], 2]`|
|is-view|inline display in page, otherwise it shows as `Popup`|Boolean|`false`|-|
|is-cascade|data in each column is cascaded or not|Boolean|`false`|see #Appendix for the format of cascaded data|
-|keep-index|keep last stop position when the column data changes|Boolean|`false`|only for cascaded data|
+|keep-index 2.5.2+|keep last stop position when the column data changes|Boolean|`false`|only for cascaded data|
|line-height|line height of options|Number|`45`|unit `px`|
|title|title of picker|String|-|-|
|describe|description of picker|String|-|-|
diff --git a/components/picker/README.md b/components/picker/README.md
index 664f3201c..36f0307f3 100644
--- a/components/picker/README.md
+++ b/components/picker/README.md
@@ -30,7 +30,7 @@ Vue.component(Picker.name, Picker)
|line-height|选择器选项行高|Number|`45`|单位`px`|
|is-view|是否内嵌在页面内展示,否则以弹层形式|Boolean|`false`|-|
|is-cascade|各列数据是否级联|Boolean|`false`|级联数据格式见附录|
-|keep-index|当列数据变化时保持上次停留的位置|Boolean|`false`|仅用于级联数据|
+|keep-index 2.5.2+|当列数据变化时保持上次停留的位置|Boolean|`false`|仅用于级联数据|
|title|选择器标题|String|-|-|
|describe|选择器描述|String|-|-|
|ok-text|选择器确认文案|String|`确认`|-|