Face masks play a very important role in the prevention of novel coronavirus pneumonia and can effectively prevent infection with novel coronavirus pneumonia. New coronavirus pneumonia is mainly transmitted through respiratory droplets and is very contagious, masks can prevent infection with new coronavirus pneumonia. The surgical mask is a three-layer structure that filters the virus and prevents it from entering the respiratory tract, and the N95 mask is significantly better than the surgical mask in terms of protection. The protective effect of the N95 mask is significantly better than the surgical mask. If the mask appears to be vaporized, the protective effect decreases significantly, so the mask should be replaced regularly. If patients or susceptible individuals are wearing masks, the chances of contracting novel coronavirus pneumonia are significantly lower, with a general possibility of less than 5%. In addition to wearing a mask, it is also important to keep a certain distance from people, to develop a good habit of “one meter line”, and to reduce the number of people and crowded public places. Pay attention to exercise to improve the immunity of the body.