diff --git a/components/drivers/Kconfig b/components/drivers/Kconfig
index f70ed4961f347e0d70f3a267e3adc89656df8c8d..f750c1c69b60a2e28224aa1c190d45f5d01ac010 100755
--- a/components/drivers/Kconfig
+++ b/components/drivers/Kconfig
@@ -392,6 +392,23 @@ menu "Using USB"
                         bool "Enable to use device as winusb device"
                         default n
                 endif
+                if RT_USB_DEVICE_CDC
+                    config RT_VCOM_TASK_STK_SIZE
+                        int "virtual com thread stack size"
+                        default 512
+                    config RT_VCOM_TX_USE_DMA
+                        bool "Enable to use dma for vcom tx"
+                        default n
+                    config RT_VCOM_SERNO
+                        string "serial number of virtual com"
+                        default "32021919830108"
+                    config RT_VCOM_SER_LEN
+                        int "serial number length of virtual com"
+                        default 14
+                    config RT_VCOM_TX_TIMEOUT
+                        int "tx timeout(ticks) of virtual com"
+                        default 1000
+                endif
                 if RT_USB_DEVICE_WINUSB
                     config RT_WINUSB_GUID
                     string "Guid for winusb"
diff --git a/components/drivers/usb/usbdevice/class/cdc_vcom.c b/components/drivers/usb/usbdevice/class/cdc_vcom.c
index c83043314e76d784829cc800581f283aa5472ae9..336cfcb1520ac2949135efe7be3a166448ca23e8 100644
--- a/components/drivers/usb/usbdevice/class/cdc_vcom.c
+++ b/components/drivers/usb/usbdevice/class/cdc_vcom.c
@@ -22,7 +22,12 @@
 
 #ifdef RT_USB_DEVICE_CDC
 
-#define TX_TIMEOUT              1000
+#ifdef RT_VCOM_TX_TIMEOUT
+#define VCOM_TX_TIMEOUT      RT_VCOM_TX_TIMEOUT
+#else /*!RT_VCOM_TX_TIMEOUT*/
+#define VCOM_TX_TIMEOUT      1000
+#endif /*RT_VCOM_TX_TIMEOUT*/
+
 #define CDC_RX_BUFSIZE          128
 #define CDC_MAX_PACKET_SIZE     64
 #define VCOM_DEVICE             "vcom"
@@ -880,7 +885,7 @@ static void vcom_tx_thread_entry(void* parameter)
 
             rt_usbd_io_request(func->device, data->ep_in, &data->ep_in->request);
 
-            if (rt_completion_wait(&data->wait, TX_TIMEOUT) != RT_EOK)
+            if (rt_completion_wait(&data->wait, VCOM_TX_TIMEOUT) != RT_EOK)
             {
                 RT_DEBUG_LOG(RT_DEBUG_USB, ("vcom tx timeout\n"));
             }