The invention provides a lung cleaning method based on an atomizing device and a breathing mask, comprising the following steps: 1) providing an atomizing device and a breathing mask connected with the atomizing device, covering the breathing mask on the nasal cavity and the oral cavity of a user; 2) providing a lung cleaning agent, atomizing that lung cleaning agent based on the atomizing deviceto form a cleaning aerosol, and inhaling the clean aerosol into the lung and into the pulmonary alveoli through the breathing mask for the user to inhale; 3) after that cleaning aerosol enter the pulmonary alveoli, stimulating the pulmonary alveoli to secrete mucus, with the mucus being combined with sediment in the pulmonary alveoli to dissolve to form sputum, and the sputum being discharged through villus peristalsis. The method can effectively clear the dust such as PM2.5 deposited in the lung alveoli of the user and ensure the health of the human lung. The invention does not need to be carried by the user, only needs to be periodically used to clear the dust such as PM2.5 deposited in the pulmonary alveoli and the like, so as to obtain a good user experience. The method has a wide application prospect in the field of medical equipment.