diff --git a/packages/notice-bar/README.md b/packages/notice-bar/README.md
index 5a61c3a8..aecb2ded 100644
--- a/packages/notice-bar/README.md
+++ b/packages/notice-bar/README.md
@@ -126,3 +126,19 @@
 | 类名         | 说明         |
 | ------------ | ------------ |
 | custom-class | 根节点样式类 |
+
+### 样式变量
+
+组件提供了下列 CSS 变量，可用于自定义样式，使用方法请参考 [ConfigProvider 组件](#/config-provider)。
+
+| 名称 | 默认值 | 描述 |
+| --- | --- | --- |
+| --notice-bar-height | _40px_ | - |
+| --notice-bar-padding | _0 var(--van-padding-md)_ | - |
+| --notice-bar-wrapable-padding | _var(--van-padding-xs) var(--van-padding-md)_ | - |
+| --notice-bar-text-color | _var(--van-orange-dark)_ | - |
+| --notice-bar-font-size | _var(--van-font-size-md)_ | - |
+| --notice-bar-line-height | _24px_ | - |
+| --notice-bar-background-color | _var(--van-orange-light)_ | - |
+| --notice-bar-icon-size | _16px_ | - |
+| --notice-bar-icon-min-width | _24px_ | - |
diff --git a/packages/notice-bar/index.wxml b/packages/notice-bar/index.wxml
index 9f6ee24f..21b0973c 100644
--- a/packages/notice-bar/index.wxml
+++ b/packages/notice-bar/index.wxml
@@ -9,7 +9,6 @@
 >
   <van-icon
     wx:if="{{ leftIcon }}"
-    size="16px"
     name="{{ leftIcon }}"
     class="van-notice-bar__left-icon"
   />
diff --git a/packages/notice-bar/test/__snapshots__/demo.spec.ts.snap b/packages/notice-bar/test/__snapshots__/demo.spec.ts.snap
index ebe24efb..b82ab08e 100644
--- a/packages/notice-bar/test/__snapshots__/demo.spec.ts.snap
+++ b/packages/notice-bar/test/__snapshots__/demo.spec.ts.snap
@@ -22,7 +22,7 @@ exports[`should render demo and match snapshot 1`] = `
           >
             <wx-view
               class="custom-class van-icon van-icon-volume-o"
-              style="font-size:16px"
+              style=""
               bind:tap="onClick"
             />
           </van-icon>
@@ -225,7 +225,7 @@ exports[`should render demo and match snapshot 1`] = `
           >
             <wx-view
               class="custom-class van-icon van-icon-info-o"
-              style="font-size:16px"
+              style=""
               bind:tap="onClick"
             />
           </van-icon>