Congenital pulmonary cysts are mostly formed due to the impassability of the germs and bronchi in the lungs, which have developed an internal effusion and become progressively larger with the prolonged course of the disease. Acquired pulmonary cysts are all secondary to encapsulated cysts due to pulmonary encapsulation. Congenital lung cysts are caused by the fact that in the early embryonic stage, if the lung buds fail to grow into tubular shape according to the normal growth and development process, the distal bronchial tissues and the proximal tissues will detach, and a blind tube will gradually be formed, and the fluid in the lumen will not be able to be discharged, and will gradually grow into a cyst. Acquired lung cysts, due to the loose tissue in the lungs and the rich blood circulation and negative pressure attraction in the chest cavity, the six hookworm larvae grow rapidly in the lungs, and are prone to form encapsulated cysts, which are often present in the X-ray examination as a uniform density, ovoid block shadow, with a relatively neat edge. If lung cysts have been detected through examination, they should go to the respiratory medicine department in time and receive standardized treatment under the guidance of doctors.