diff --git a/docs/en-US/component/slider.md b/docs/en-US/component/slider.md
index 16a0231370..baccdddcbd 100644
--- a/docs/en-US/component/slider.md
+++ b/docs/en-US/component/slider.md
@@ -92,7 +92,7 @@ slider/show-marks
 | step                  | step size                                                                                                 | number          | —                                                                                                         | 1       |
 | show-input            | whether to display an input box, works when `range` is false                                              | boolean         | —                                                                                                         | false   |
 | show-input-controls   | whether to display control buttons when `show-input` is true                                              | boolean         | —                                                                                                         | true    |
-| size                  | size of the slider                                                                                        | string          | large / default / small                                                                                   | default |
+| size                  | size of the slider wrapper, will not work in vertical mode                                                | string          | large / default / small                                                                                   | default |
 | input-size            | size of the input box, when set `size`, the default is the value of `size`                                | string          | large / default / small                                                                                   | default |
 | show-stops            | whether to display breakpoints                                                                            | boolean         | —                                                                                                         | false   |
 | show-tooltip          | whether to display tooltip value                                                                          | boolean         | —                                                                                                         | true    |