diff --git a/services/native/src/usb_device_manager.cpp b/services/native/src/usb_device_manager.cpp
index a6c96c1ba69eb1cdd03cf4ae61ca01bf31811ad9..80a3414dfe8fce7b6862a7183100104bfc0d81d9 100644
--- a/services/native/src/usb_device_manager.cpp
+++ b/services/native/src/usb_device_manager.cpp
@@ -58,6 +58,11 @@ UsbDeviceManager::UsbDeviceManager()
 int32_t UsbDeviceManager::Init()
 {
     std::shared_ptr<UsbFunctionSwitchWindow> window_ = UsbFunctionSwitchWindow::GetInstance();
+    if (window_ == nullptr) {
+        USB_HILOGE(MODULE_USB_SERVICE, "get usb function switch window failed");
+        return UEC_SERVICE_INNER_ERR;
+    }
+
     int32_t ret = window_->Init();
     if (ret != UEC_OK) {
         USB_HILOGE(MODULE_USB_SERVICE, "Init usb function switch window failed");
@@ -226,6 +231,11 @@ void UsbDeviceManager::ProcessFuncChange(bool connected, int32_t currentFunc)
 void UsbDeviceManager::ProcessFunctionSwitchWindow(bool connected)
 {
     std::shared_ptr<UsbFunctionSwitchWindow> window_ = UsbFunctionSwitchWindow::GetInstance();
+    if (window_ == nullptr) {
+        USB_HILOGE(MODULE_USB_SERVICE, "show window: get usb function switch window failed");
+        return;
+    }
+
     if (connected) {
         USB_HILOGD(MODULE_USB_SERVICE, "start pop up usb service switch window");
         if (!window_->PopUpFunctionSwitchWindow()) {
diff --git a/services/native/src/usb_function_switch_window.cpp b/services/native/src/usb_function_switch_window.cpp
index cb6016e96379b608a2bb3d7c97fcbe43e5132972..1f236a0aab35469e567001d2de90ad9ccd542060 100644
--- a/services/native/src/usb_function_switch_window.cpp
+++ b/services/native/src/usb_function_switch_window.cpp
@@ -127,6 +127,11 @@ void UsbFunctionSwitchWindow::UsbFuncAbilityConn::OnAbilityConnectDone(const App
     const sptr<IRemoteObject> &remoteObject, int32_t resultCode)
 {
     USB_HILOGI(MODULE_USB_SERVICE, "OnAbilityConnectDone");
+    if (remoteObject == nullptr) {
+        USB_HILOGE(MODULE_USB_SERVICE, "remoteObject is nullptr");
+        return;
+    }
+
     MessageParcel data;
     MessageParcel reply;
     MessageOption option;