diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/usb_service/usb_host.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/usb_service/usb_host.c
index 14b2f8a76..e0b7cd6b9 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/usb_service/usb_host.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/usb_service/usb_host.c
@@ -77,6 +77,34 @@ void ipc_rndis_init(void){
     }
 }
 
+static void usb_check_phymode(int id)
+{
+#define PIPE_PHY_GRF0 0xFDC70000
+#define PIPE_PHY_GRF1 0xFDC80000
+#define PIPE_PHY_GRF_PIPE_CON0 0x00
+#define PIPE_PHY_GRF_VIRADDR_BASE 0x0000002100000000ULL
+    void *base = (void *)PIPE_PHY_GRF0;
+    void *base_vir = (void *)PIPE_PHY_GRF_VIRADDR_BASE;
+    uint32_t pipe_phymode;
+
+    if (USB3_0_ID == id) {
+        base = (void *)PIPE_PHY_GRF0;
+    }
+    if (USB3_1_ID == id) {
+        base = (void *)PIPE_PHY_GRF1;
+    }
+
+    if(!mmap((uintptr_t)base_vir, (uintptr_t)base, 0xFF, true)){
+        USB_LOG_ERR("usb_check_phy mmap fail\n");
+    }
+
+    pipe_phymode = readl ( base_vir + PIPE_PHY_GRF_PIPE_CON0 );
+    USB_LOG_DBG("usbh_initialize PIPE_PHY_GRF_PIPE_CON0=%08X\n", pipe_phymode);
+    if ( (pipe_phymode & 0x000C) != 0x0004) {
+        USB_LOG_ERR("usbh_initialize PIPE_PHY_GRF_PIPE_CON0=%08X is not USB3 mode\n", pipe_phymode);
+    }
+}
+
 static void usb_init(int id)
 {
     if (0 == usbh_initialize(id, &usb[id])){
@@ -100,6 +128,8 @@ int main(int argc, char* argv[])
         }
     }
     printf("main usb3 id=%d init.\r\n", id);
+
+    usb_check_phymode(id);
     usb_init(id);
 
     ipc_rndis_init();