In the case of a serious new coronavirus epidemic, mask resources are often scarce and masks are not so easily available. Therefore, for people at home to carry out ordinary social activities, such as taking public transportation, going to the supermarket, shopping in the market, and staff who do not work outside the office, such masks can be reused for low-risk people. It is recommended to hang the mask in a clean and ventilated place after each use, you can also use a clean paper bag with the mask, you can also put a clean padded cloth inside the mask against the mouth and nose, you can protect the inner diluted layer of the mask. It is not possible to disinfect the mask with alcohol because it will destroy the fiber structure of the mask and cause the mask to lose its protective effect. As to whether the UV disinfection mask can effectively kill the virus and fine are to be further confirmed, and the method of alternating the mask can be used, which is to prepare two masks for rotation.