* [doc] Update doc for line-height. (#229)
diff --git a/source/cn/wiki/text-styles.md b/source/cn/wiki/text-styles.md
index 89a5d84..4a66ad7 100644
--- a/source/cn/wiki/text-styles.md
+++ b/source/cn/wiki/text-styles.md
@@ -34,6 +34,7 @@
* `text-overflow {string}`：设置内容超长时的省略样式。可选值 `clip` | `ellipsis`
>> 只有 `<text>`和`<richtext>`组件支持。
* `lines {number}`: 正整数，指定最大文本行数，默认值为0，表示不限制最大行数。如果文本不够长，实际展示行数会小于指定行数。
+* `line-height {length}`：正整数，每行文字高度。`line-height`是 top 至 bottom 的距离。`line-height`与`font-size`没有关系，因为`line-height`被 top 和 bottom 所限制，`font-size` 被 glyph 所解析。`line-height`和`font-size`相等一般会导致文字被截断。
## 其它参考
- [颜色关键字列表](./color-names.html)。
diff --git a/source/wiki/text-styles.md b/source/wiki/text-styles.md
index 1cb5c8d..40592f1 100644
--- a/source/wiki/text-styles.md
+++ b/source/wiki/text-styles.md
@@ -39,6 +39,7 @@
- `text-overflow`:<enum> `clip` | `ellipsis`. This property determines how overflowed content that is not displayed is signaled to users. It can be clipped, display an ellipsis.
>> Only support for `<text>` and `<ricthext>`
- `lines`: <number> positive number. This is the max lines of text that would be displayed, the default value is 0 which means there is no restriction on text lines. If the text is not enough, the actual number of line may be shorter than the specified value.
+- `line-height`: <length> The line height of every line in the text. `line-height` is the space between top and bottom. There is no relationship between `line-height` and `font-size`, as `line-height` is restricted by top and bottom, `font-size` is interpreted by glyph. Usually but not always, `line-height` and `font-size` with the same value will cause the text clipped.
## Note
* [The list of color keywords.](./color-names.html)
