diff --git a/docs/component/map.md b/docs/component/map.md
index d0dc8e75e295c7c40259077d61c1d0210bf1e6f6..b03a3635395dead775055360c4cd55b083c70cc4 100644
--- a/docs/component/map.md
+++ b/docs/component/map.md
@@ -169,7 +169,7 @@ MapContext.on('markerClusterCreate', callback) 触发时，通过 [MapContext.ad
 |points|经纬度数组|array|是|[{latitude: 0, longitude: 0}]
 |strokeWidth|描边的宽度|Number|否||
 |strokeColor|描边的颜色|String|否|十六进制|
-|fillColor|填充颜色|String|否|十六进制|
+|fillColor|填充颜色|String|否|十六进制AA表示使用滤镜6A或者4A即可设置透明度前提颜色为十六进制如：#0000004A|
 |zIndex|设置多边形 Z 轴数值|Number|否||
 |level|压盖关系，默认为 abovelabels|String|false|微信小程序|