Industrial alcohol cannot kill coronavirus. Industrial alcohol contains methanol, which is toxic and has an irritating odor that can poison people through the nose, skin, respiratory tract, and mucous membranes of the digestive tract, so it cannot be used for human disinfection and can only be used as a cleaning agent and solvent. The current study concluded that only the concentration of 75% medical alcohol to kill the coronavirus, generally with a clean cotton cloth dipped in an appropriate amount of alcohol on the surface of the object to wipe or directly applied to the hands to retain at least 30 seconds. In the use of the need to pay attention to avoid open flames, can not be taken to spray the way to avoid causing fire and other accidents.