The main reason for the outbreak of Nanjing Lukou Airport is the lack of understanding of the seriousness, complexity and long-term nature of the epidemic prevention and control work and lax daily management. Due to the serious shortage of disinfection time and disinfectant dosage, and the nonstandard disinfection operation, the COVID-19 virus in the cabin has not been completely killed and still remains in the toilet area. During the cleaning process, it is not standard for the cleaning staff to take off the protective clothing, and the rubber gloves do not cover the cuffs of the protective clothing. During the operation, the gloves slip, and the gloves wipe their faces and touch the skin, which leads to contact and infection with COVID-19 virus.