During the novel coronavirus pneumonia outbreak, the disposal of masks after use varies by population type. For masks worn by the general population, if there is no risk of novel coronavirus transmission, they can be disposed of after use according to the requirements of household waste classification. The masks used by suspected cases and their caregivers should be collected and disposed of in accordance with medical waste, and hands should be washed after the masks are disposed of. The discarded masks generated by hospitals with fever clinics and each centralized isolation observation site need to be put directly into medical waste garbage bags and then incorporated into medical waste for uniform and harmless treatment.