diff --git a/zh-cn/application-dev/reference/apis/js-apis-usb-deprecated.md b/zh-cn/application-dev/reference/apis/js-apis-usb-deprecated.md
index 90a86e2c1b414f4509e807450837cc3952045da0..68f5a8a72e34b7aa9d0940cc4b5754c189bbb79b 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-usb-deprecated.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-usb-deprecated.md
@@ -110,7 +110,14 @@ connectDevice(device: USBDevice): Readonly<USBDevicePipe>
 **示例：**
 
 ```js
-let devicepipe= usb.connectDevice(device);
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+}
+
+let device = devicesList[0];
+usb.requestRight(device.name);
+let devicepipe = usb.connectDevice(device);
 console.log(`devicepipe = ${devicepipe}`);
 ```
 
@@ -137,9 +144,9 @@ hasRight(deviceName: string): boolean
 **示例：**
 
 ```js
-let devicesName="1-1";
+let devicesName = "1-1";
 let bool = usb.hasRight(devicesName);
-console.log(bool);
+console.log(`${bool}`);
 ```
 
 ## usb.requestRight
@@ -165,7 +172,7 @@ requestRight(deviceName: string): Promise<boolean>
 **示例：**
 
 ```js
-let devicesName="1-1";
+let devicesName= "1-1";
 usb.requestRight(devicesName).then((ret) => {
   console.log(`requestRight = ${ret}`);
 });
@@ -198,6 +205,16 @@ claimInterface(pipe: USBDevicePipe, iface: USBInterface, force ?: boolean): numb
 **示例：**
 
 ```js
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+let device = devicesList[0];
+usb.requestRight(device.name);
+let devicepipe = usb.connectDevice(device);
+let interfaces = device.configs[0].interfaces[0];
 let ret = usb.claimInterface(devicepipe, interfaces);
 console.log(`claimInterface = ${ret}`);
 ```
@@ -228,7 +245,18 @@ releaseInterface(pipe: USBDevicePipe, iface: USBInterface): number
 **示例：**
 
 ```js
-let ret = usb.releaseInterface(devicepipe, interfaces);
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+let device = devicesList[0];
+usb.requestRight(device.name);
+let devicepipe = usb.connectDevice(device);
+let interfaces = device.configs[0].interfaces[0];
+let ret = usb.claimInterface(devicepipe, interfaces);
+ret = usb.releaseInterface(devicepipe, interfaces);
 console.log(`releaseInterface = ${ret}`);
 ```
 
@@ -258,6 +286,16 @@ setConfiguration(pipe: USBDevicePipe, config: USBConfig): number
 **示例：**
 
 ```js
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+let device = devicesList[0];
+usb.requestRight(device.name);
+let devicepipe = usb.connectDevice(device);
+let config = device.configs[0];
 let ret = usb.setConfiguration(devicepipe, config);
 console.log(`setConfiguration = ${ret}`);
 ```
@@ -288,7 +326,18 @@ setInterface(pipe: USBDevicePipe, iface: USBInterface): number
 **示例：**
 
 ```js
-let ret = usb.setInterface(devicepipe, interfaces);
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+let device = devicesList[0];
+usb.requestRight(device.name);
+let devicepipe = usb.connectDevice(device);
+let interfaces = device.configs[0].interfaces[0];
+let ret = usb.claimInterface(devicepipe, interfaces);
+ret = usb.setInterface(devicepipe, interfaces);
 console.log(`setInterface = ${ret}`);
 ```
 
@@ -317,6 +366,14 @@ getRawDescriptor(pipe: USBDevicePipe): Uint8Array
 **示例：**
 
 ```js
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+usb.requestRight(devicesList[0].name);
+let devicepipe = usb.connectDevice(devicesList[0]);
 let ret = usb.getRawDescriptor(devicepipe);
 ```
 
@@ -345,6 +402,14 @@ getFileDescriptor(pipe: USBDevicePipe): number
 **示例：**
 
 ```js
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+usb.requestRight(devicesList[0].name);
+let devicepipe = usb.connectDevice(devicesList[0]);
 let ret = usb.getFileDescriptor(devicepipe);
 ```
 
@@ -375,10 +440,26 @@ controlTransfer(pipe: USBDevicePipe, controlparam: USBControlParams, timeout ?:
 **示例：**
 
 ```js
-let param = new usb.USBControlParams();
+let param = {
+  request: 0,
+  reqType: 0,
+  target:0,
+  value: 0,
+  index: 0,
+  data: null
+};
+
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+usb.requestRight(devicesList[0].name);
+let devicepipe = usb.connectDevice(devicesList[0]);
 usb.controlTransfer(devicepipe, param).then((ret) => {
  console.log(`controlTransfer = ${ret}`);
-})
+});
 ```
 
 ## usb.bulkTransfer
@@ -412,8 +493,22 @@ bulkTransfer(pipe: USBDevicePipe, endpoint: USBEndpoint, buffer: Uint8Array, tim
 //usb.getDevices 接口返回数据集合，取其中一个设备对象，并获取权限 。
 //把获取到的设备对象作为参数传入usb.connectDevice;当usb.connectDevice接口成功返回之后；
 //才可以调用第三个接口usb.claimInterface.当usb.claimInterface 调用成功以后,再调用该接口。
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+let device = devicesList[0];
+usb.requestRight(device.name);
+
+let devicepipe = usb.connectDevice(device);
+let interfaces = device.configs[0].interfaces[0];
+let endpoint = device.configs[0].interfaces[0].endpoints[0];
+let ret = usb.claimInterface(devicepipe, interfaces);
+let buffer =  new Uint8Array(128);
 usb.bulkTransfer(devicepipe, endpoint, buffer).then((ret) => {
- console.log(`bulkTransfer = ${ret}`);
+  console.log(`bulkTransfer = ${ret}`);
 });
 ```
 
@@ -442,6 +537,14 @@ closePipe(pipe: USBDevicePipe): number
 **示例：**
 
 ```js
+let devicesList = usb.getDevices();
+if (devicesList.length == 0) {
+  console.log(`device list is empty`);
+  return;
+}
+
+usb.requestRight(devicesList[0].name);
+let devicepipe = usb.connectDevice(devicesList[0]);
 let ret = usb.closePipe(devicepipe);
 console.log(`closePipe = ${ret}`);
 ```
@@ -500,7 +603,7 @@ usbFunctionsToString(funcs: FunctionType): string
 **示例：**
 
 ```js
-let funcs = usb.ACM | usb.ECM;
+let funcs = usb.FunctionType.ACM | usb.FunctionType.ECM;
 let ret = usb.usbFunctionsToString(funcs);
 ```
 
@@ -529,8 +632,12 @@ setCurrentFunctions(funcs: FunctionType): Promise\<boolean\>
 **示例：**
 
 ```js
-let funcs = usb.HDC;
-let ret = usb.setCurrentFunctions(funcs);
+let funcs = usb.FunctionType.HDC;
+usb.setCurrentFunctions(funcs).then(() => {
+    console.info('usb setCurrentFunctions successfully.');
+}).catch(err => {
+    console.error('usb setCurrentFunctions failed: ' + err.code + ' message: ' + err.message);
+});
 ```
 
 ## usb.getCurrentFunctions<sup>9+</sup>
diff --git a/zh-cn/application-dev/reference/apis/js-apis-usbManager.md b/zh-cn/application-dev/reference/apis/js-apis-usbManager.md
index f9a884db278e3706ceb42e17f9426e2ff2391429..00b14dff37df14583039e937362f7648521ce758 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-usbManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-usbManager.md
@@ -531,7 +531,7 @@ usb.requestRight(devicesList[0].name);
 let devicepipe = usb.connectDevice(devicesList[0]);
 usb.controlTransfer(devicepipe, param).then((ret) => {
  console.log(`controlTransfer = ${ret}`);
-})
+});
 ```
 
 ## usb.bulkTransfer