diff --git a/README.md b/README.md
index f75021c..018d559 100644
--- a/README.md
+++ b/README.md
@@ -60,12 +60,12 @@ ScreenUtil.init(context, width: 750, height: 1334, allowFontScaling: true);
 
 ### Use：
 
-#### API
+### API
 
 ```dart
-    ScreenUtil().setWidth(540) (sdk>=2.6 : 540.w) //Adapted to screen width
+    ScreenUtil().setWidth(540)  (sdk>=2.6 : 540.w) //Adapted to screen width
     ScreenUtil().setHeight(200) (sdk>=2.6 : 200.h) //Adapted to screen height
-    ScreenUtil().setSp(24)     (sdk>=2.6 : 24.sp)  //Adapter font
+    ScreenUtil().setSp(24)      (sdk>=2.6 : 24.sp)  //Adapter font
     ScreenUtil().setSp(24, allowFontScalingSelf: true)  (sdk>=2.6 : 24.ssp) //Adapter font(fonts will scale to respect Text Size accessibility settings)
 
     ScreenUtil.pixelRatio       //Device pixel density
diff --git a/README_CN.md b/README_CN.md
index d245e9e..5f67236 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -64,12 +64,12 @@ ScreenUtil.init(context, width: 750, height: 1334, allowFontScaling: true);
 
 ### 使用
 
-#### API
+### API
 
 ```dart
-    ScreenUtil().setWidth(540) (sdk>=2.6 : 540.w) //根据屏幕宽度适配尺寸
+    ScreenUtil().setWidth(540)  (sdk>=2.6 : 540.w) //根据屏幕宽度适配尺寸
     ScreenUtil().setHeight(200) (sdk>=2.6 : 200.h) //根据屏幕高度适配尺寸
-    ScreenUtil().setSp(24)     (sdk>=2.6 : 24.sp)  //适配字体
+    ScreenUtil().setSp(24)      (sdk>=2.6 : 24.sp)  //适配字体
     ScreenUtil().setSp(24, allowFontScalingSelf: true)  (sdk>=2.6 : 24.ssp) //适配字体(根据系统的“字体大小”辅助选项来进行缩放)
 
     ScreenUtil.pixelRatio       //设备的像素密度
diff --git a/README_PT.md b/README_PT.md
index 94bb06f..d7aef1d 100644
--- a/README_PT.md
+++ b/README_PT.md
@@ -60,12 +60,12 @@ ScreenUtil.init(context, width: 750, height: 1334, allowFontScaling: true);
 
 ### Uso：
 
-#### API
+### API
 
 ```dart
-    ScreenUtil().setWidth(540) (sdk>=2.6 : 540.w) //Adapted to screen width
+    ScreenUtil().setWidth(540)  (sdk>=2.6 : 540.w) //Adapted to screen width
     ScreenUtil().setHeight(200) (sdk>=2.6 : 200.h) //Adapted to screen height
-    ScreenUtil().setSp(24)     (sdk>=2.6 : 24.sp)  //Adapter font
+    ScreenUtil().setSp(24)      (sdk>=2.6 : 24.sp)  //Adapter font
     ScreenUtil().setSp(24, allowFontScalingSelf: true)  (sdk>=2.6 : 24.ssp) //Adapter font(fonts will scale to respect Text Size accessibility settings)
 
     ScreenUtil.pixelRatio       //Device pixel density