Open your king root on your device and click on menu icon at the top then click General setting off enable root authorization Under General settings scroll down to uninstall
kingroot and click on it to removed Root permission A pop up will come out saying that you will lost root access just click Continue Another pop up will appears againg just press OK to remove the root authorization. Now wait for few seconds for the process to complete. When the process complete successful you will notice that the kingroot will NO LONGER BE on your device which mean you dont have any root access on your device anymore. If you are having doubt if you are still rooted, you can verify the status of your device by downloading root checker from playstore here to check if your device has root access or not.