The current routes of transmission of novel coronavirus pneumonia caused by novel coronavirus are mainly the respiratory route and close contact transmission. Currently, it is divided into direct transmission, which is mainly caused by the patient sneezing, running nose, coughing, speaking out droplets and exhaled gases, which come into close contact with other healthy people and cause them to inhale into the airway and cause infection. In addition, droplets can be mixed in the air and form aerosols, which can be inhaled by healthy people in a closed environment and cause infection. Droplets are deposited on the surface of objects, and healthy people who come into contact with contaminated objects and then touch their mouths, nasal cavities, eyes and other mucous membranes will also be absorbed, leading to infection with the new coronavirus.