diff --git a/class/cdc/usbh_cdc_ecm.c b/class/cdc/usbh_cdc_ecm.c
index af8816b8..cc016491 100644
--- a/class/cdc/usbh_cdc_ecm.c
+++ b/class/cdc/usbh_cdc_ecm.c
@@ -230,12 +230,13 @@ static void usbh_cdc_ecm_rx_thread(void *argument)
     struct pbuf *p;
     struct netif *netif = (struct netif *)argument;
 
+    USB_LOG_INFO("Create cdc ecm rx thread\r\n");
     // clang-format off
 find_class:
     // clang-format on
     g_cdc_ecm_class.connect_status = false;
-    while (usbh_find_class_instance("/dev/cdc_ether") == NULL) {
-        usb_osal_msleep(1000);
+    if (usbh_find_class_instance("/dev/cdc_ether") == NULL) {
+        goto delete;
     }
 
     while (g_cdc_ecm_class.connect_status == false) {
@@ -275,6 +276,9 @@ find_class:
         } else {
         }
     }
+delete:
+    USB_LOG_INFO("Delete cdc ecm rx thread\r\n");
+    usb_osal_thread_delete(NULL);
 }
 
 err_t usbh_cdc_ecm_linkoutput(struct netif *netif, struct pbuf *p)
@@ -305,12 +309,7 @@ err_t usbh_cdc_ecm_linkoutput(struct netif *netif, struct pbuf *p)
 
 void usbh_cdc_ecm_lwip_thread_init(struct netif *netif)
 {
-    g_cdc_ecm_class.thread = usb_osal_thread_create("usbh_cdc_ecm_rx", 2048, CONFIG_USBHOST_PSC_PRIO + 1, usbh_cdc_ecm_rx_thread, netif);
-}
-
-void usbh_cdc_ecm_lwip_thread_deinit(void)
-{
-    usb_osal_thread_delete(g_cdc_ecm_class.thread);
+    usb_osal_thread_create("usbh_cdc_ecm_rx", 2048, CONFIG_USBHOST_PSC_PRIO + 1, usbh_cdc_ecm_rx_thread, netif);
 }
 
 __WEAK void usbh_cdc_ecm_run(struct usbh_cdc_ecm *cdc_ecm_class)
diff --git a/class/cdc/usbh_cdc_ecm.h b/class/cdc/usbh_cdc_ecm.h
index 27843004..7d65da0b 100644
--- a/class/cdc/usbh_cdc_ecm.h
+++ b/class/cdc/usbh_cdc_ecm.h
@@ -32,8 +32,6 @@ struct usbh_cdc_ecm {
     ip_addr_t ipaddr;
     ip_addr_t netmask;
     ip_addr_t gateway;
-
-    usb_osal_thread_t thread;
 };
 
 #ifdef __cplusplus
@@ -45,7 +43,6 @@ void usbh_cdc_ecm_stop(struct usbh_cdc_ecm *cdc_ecm_class);
 
 err_t usbh_cdc_ecm_linkoutput(struct netif *netif, struct pbuf *p);
 void usbh_cdc_ecm_lwip_thread_init(struct netif *netif);
-void usbh_cdc_ecm_lwip_thread_deinit(void);
 
 #ifdef __cplusplus
 }
diff --git a/class/wireless/usbh_rndis.c b/class/wireless/usbh_rndis.c
index ba458be2..c1c308a1 100644
--- a/class/wireless/usbh_rndis.c
+++ b/class/wireless/usbh_rndis.c
@@ -434,12 +434,13 @@ static void usbh_rndis_rx_thread(void *argument)
     rndis_data_packet_t temp;
     struct netif *netif = (struct netif *)argument;
 
+    USB_LOG_INFO("Create rndis rx thread\r\n");
     // clang-format off
 find_class:
     // clang-format on
     g_rndis_class.link_status = false;
-    while (usbh_find_class_instance("/dev/rndis") == NULL) {
-        usb_osal_msleep(1000);
+    if (usbh_find_class_instance("/dev/rndis") == NULL) {
+        goto delete;
     }
 
     while (g_rndis_class.link_status == false) {
@@ -494,6 +495,9 @@ find_class:
             }
         }
     }
+delete:
+    USB_LOG_INFO("Delete rndis rx thread\r\n");
+    usb_osal_thread_delete(NULL);
 }
 
 err_t usbh_rndis_linkoutput(struct netif *netif, struct pbuf *p)
@@ -509,7 +513,7 @@ err_t usbh_rndis_linkoutput(struct netif *netif, struct pbuf *p)
 
     hdr = (rndis_data_packet_t *)g_rndis_tx_buffer;
     memset(hdr, 0, sizeof(rndis_data_packet_t));
-    
+
     hdr->MessageType = REMOTE_NDIS_PACKET_MSG;
     hdr->MessageLength = sizeof(rndis_data_packet_t) + p->tot_len;
     hdr->DataOffset = sizeof(rndis_data_packet_t) - sizeof(rndis_generic_msg_t);
@@ -539,12 +543,7 @@ err_t usbh_rndis_linkoutput(struct netif *netif, struct pbuf *p)
 
 void usbh_rndis_lwip_thread_init(struct netif *netif)
 {
-    g_rndis_class.thread = usb_osal_thread_create("usbh_rndis_rx", 2560, CONFIG_USBHOST_PSC_PRIO + 1, usbh_rndis_rx_thread, netif);
-}
-
-void usbh_rndis_lwip_thread_deinit(void)
-{
-    usb_osal_thread_delete(g_rndis_class.thread);
+    usb_osal_thread_create("usbh_rndis_rx", 2560, CONFIG_USBHOST_PSC_PRIO + 1, usbh_rndis_rx_thread, netif);
 }
 
 __WEAK void usbh_rndis_run(struct usbh_rndis *rndis_class)
diff --git a/class/wireless/usbh_rndis.h b/class/wireless/usbh_rndis.h
index 95b011dc..c55c113f 100644
--- a/class/wireless/usbh_rndis.h
+++ b/class/wireless/usbh_rndis.h
@@ -33,8 +33,6 @@ struct usbh_rndis {
     ip_addr_t ipaddr;
     ip_addr_t netmask;
     ip_addr_t gateway;
-
-    usb_osal_thread_t thread;
 };
 
 #ifdef __cplusplus
@@ -48,7 +46,6 @@ void usbh_rndis_stop(struct usbh_rndis *rndis_class);
 
 err_t usbh_rndis_linkoutput(struct netif *netif, struct pbuf *p);
 void usbh_rndis_lwip_thread_init(struct netif *netif);
-void usbh_rndis_lwip_thread_deinit(void);
 
 #ifdef __cplusplus
 }
diff --git a/demo/usb_host.c b/demo/usb_host.c
index 963b13a3..6dc93943 100644
--- a/demo/usb_host.c
+++ b/demo/usb_host.c
@@ -487,7 +487,6 @@ void usbh_cdc_ecm_stop(struct usbh_cdc_ecm *cdc_ecm_class)
     netif_set_down(netif);
     netif_remove(netif);
 #endif
-    usbh_cdc_ecm_lwip_thread_deinit();
 }
 #endif
 
@@ -513,7 +512,7 @@ void timer_init(struct usbh_rndis *rndis_class)
     keep_timer = rt_timer_create("keep",
                                  rndis_dev_keepalive_timeout,
                                  rndis_class,
-                                 3000,
+                                 5000,
                                  RT_TIMER_FLAG_PERIODIC |
                                      RT_TIMER_FLAG_SOFT_TIMER);
 
@@ -531,7 +530,7 @@ static void rndis_dev_keepalive_timeout(TimerHandle_t xTimer)
 
 void timer_init(struct usbh_rndis *rndis_class)
 {
-    timer_handle = xTimerCreate((const char *)NULL, (TickType_t)3000, (UBaseType_t)pdTRUE, (void *const)rndis_class, (TimerCallbackFunction_t)rndis_dev_keepalive_timeout);
+    timer_handle = xTimerCreate((const char *)NULL, (TickType_t)5000, (UBaseType_t)pdTRUE, (void *const)rndis_class, (TimerCallbackFunction_t)rndis_dev_keepalive_timeout);
     if (NULL != timer_handle) {
         xTimerStart(timer_handle, 0);
     } else {
@@ -615,7 +614,6 @@ void usbh_rndis_stop(struct usbh_rndis *rndis_class)
     xTimerStop(timer_handle, 0);
     xTimerDelete(timer_handle, 0);
 #endif
-    usbh_rndis_lwip_thread_deinit();
 }
 #endif