diff --git a/example/lib/example_extension.dart b/example/lib/example_extension.dart
new file mode 100644
index 0000000..989fbcf
--- /dev/null
+++ b/example/lib/example_extension.dart
@@ -0,0 +1,47 @@
+import 'package:ansu_ui/ansu_ui.dart';
+import 'package:flutter/material.dart';
+import 'package:ansu_ui/ansu_ui.dart';
+
+class ExampleExtension extends StatefulWidget {
+  ExampleExtension({Key key}) : super(key: key);
+
+  @override
+  _ExampleExtensionState createState() => _ExampleExtensionState();
+}
+
+class _ExampleExtensionState extends State<ExampleExtension> {
+  @override
+  Widget build(BuildContext context) {
+    return ASScaffold(
+      title: 'Extension',
+      body: ListView(
+        children: [
+          ListTile(
+            title: Text('.phone'),
+            trailing: Text('17855823545  =>  ${'17855823545'.phone}'),
+          ),
+          ListTile(
+            title: Text('.comma'),
+            trailing: Text('1000  =>  ${1000.comma}'),
+          ),
+          ListTile(
+            title: Text('.comma'),
+            trailing: Text('1000000  =>  ${1000000.comma}'),
+          ),
+          ListTile(
+            title: Text('.comma'),
+            trailing: Text('100.00 =>  ${100.00.comma}'),
+          ),
+          ListTile(
+            title: Text('.comma'),
+            trailing: Text('0.123456 =>  ${0.123456.comma}'),
+          ),
+           ListTile(
+            title: Text('.comma'),
+            trailing: Text('123456.789 =>  ${123456.789.comma}'),
+          ),
+        ],
+      ),
+    );
+  }
+}
diff --git a/example/lib/main_home.dart b/example/lib/main_home.dart
index f7362dc..58f4ac4 100644
--- a/example/lib/main_home.dart
+++ b/example/lib/main_home.dart
@@ -3,6 +3,7 @@ import 'package:example/example_bottom_button.dart';
 import 'package:example/example_box.dart';
 import 'package:example/example_dialog.dart';
 import 'package:example/example_drawer.dart';
+import 'package:example/example_extension.dart';
 import 'package:example/example_listtile.dart';
 import 'package:example/example_refresh.dart';
 import 'package:example/example_tag.dart';
@@ -78,6 +79,10 @@ class _MainHomeState extends State<MainHome> {
           title: '选框 Box',
           onPressed: () => Get.to(ExampleBox()),
         ),
+        ASButton.info(
+          title: '插件 Extension',
+          onPressed: () => Get.to(ExampleExtension()),
+        ),
       ],
     );
   }
diff --git a/lib/ansu_ui.dart b/lib/ansu_ui.dart
index 4fd0d8f..71b3c23 100644
--- a/lib/ansu_ui.dart
+++ b/lib/ansu_ui.dart
@@ -37,8 +37,9 @@ export 'text_field/as_search_text_field.dart';
 
 export 'utils/screen_adapter.dart';
 
-export 'extension/sizedbox_extension.dart';
-export 'extension/separate_extension.dart';
+export 'extension/num_extension.dart';
+export 'extension/widget_extension.dart';
+export 'extension/string_extension.dart';
 
 //`BOTTOM` is external lib
 export 'package:flutter_screenutil/flutter_screenutil.dart';
diff --git a/lib/dialog/as_dialog.dart b/lib/dialog/as_dialog.dart
index dd9cb3c..e442bd3 100644
--- a/lib/dialog/as_dialog.dart
+++ b/lib/dialog/as_dialog.dart
@@ -2,7 +2,7 @@ import 'package:ansu_ui/styles/as_colors.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
-import 'package:ansu_ui/extension/sizedbox_extension.dart';
+import 'package:ansu_ui/extension/num_extension.dart';
 
 class ASDialog extends StatefulWidget {
   final bool close;
diff --git a/lib/extension/num_extension.dart b/lib/extension/num_extension.dart
new file mode 100644
index 0000000..23ace36
--- /dev/null
+++ b/lib/extension/num_extension.dart
@@ -0,0 +1,43 @@
+import 'package:ansu_ui/ansu_ui.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_screenutil/flutter_screenutil.dart';
+
+extension NumExt on num {
+  ///获取宽 SizedBox
+  Widget get wb => SizedBox(width: this.w);
+
+  ///获取高 SizedBox
+  Widget get hb => SizedBox(height: this.w);
+
+  ///圆角
+  BorderRadius get radius => BorderRadius.circular(this.w);
+
+  ///每三位数加逗号
+  String get comma {
+    String _num = this.toString();
+    String str = '';
+    int count = 0;
+    if (_num.indexOf('.') == -1) {
+      for (var i = _num.length - 1; i >= 0; i--) {
+        if (count % 3 == 0 && count != 0) {
+          str = _num.substring(i, i + 1) + ',' + str;
+        } else {
+          str = _num.substring(i, i + 1) + str;
+        }
+        count++;
+      }
+      return str;
+    } else {
+      for (var i = _num.indexOf('.') - 1; i >= 0; i--) {
+        if (count % 3 == 0 && count!= 0) {
+          str = _num.substring(i, i + 1) + ',' + str;
+        } else {
+          str = _num.substring(i, i + 1) + str;
+        }
+        count++;
+      }
+      str=str+(_num.substring(_num.indexOf('.'),_num.length));
+      return str;
+    }
+  }
+}
diff --git a/lib/extension/sizedbox_extension.dart b/lib/extension/sizedbox_extension.dart
deleted file mode 100644
index 5c5a0b9..0000000
--- a/lib/extension/sizedbox_extension.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-import 'package:ansu_ui/ansu_ui.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_screenutil/flutter_screenutil.dart';
-
-extension NumExt on num {
-  ///获取宽 SizedBox
-  Widget get wb => SizedBox(width: this.w);
-
-  ///获取高 SizedBox
-  Widget get hb => SizedBox(height: this.w);
-
-  ///圆角
-  BorderRadius get radius => BorderRadius.circular(this.w);
-}
diff --git a/lib/extension/string_extension.dart b/lib/extension/string_extension.dart
new file mode 100644
index 0000000..20ddbf7
--- /dev/null
+++ b/lib/extension/string_extension.dart
@@ -0,0 +1,10 @@
+extension PhoneExt on String {
+  String get phone {
+    ///电话号码加分隔线
+    return (this.substring(0, 3) +
+        '-' +
+        this.substring(3, 7) +
+        '-' +
+        this.substring(7, 11));
+  }
+}
diff --git a/lib/extension/separate_extension.dart b/lib/extension/widget_extension.dart
similarity index 100%
rename from lib/extension/separate_extension.dart
rename to lib/extension/widget_extension.dart
diff --git a/lib/list_tile/as_option_tile_item.dart b/lib/list_tile/as_option_tile_item.dart
index 9c7a84d..2c96915 100644
--- a/lib/list_tile/as_option_tile_item.dart
+++ b/lib/list_tile/as_option_tile_item.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
-import 'package:ansu_ui/extension/sizedbox_extension.dart';
+import 'package:ansu_ui/extension/num_extension.dart';
 
 class ASOptionTileItem extends StatelessWidget {
   final Widget leading;