Postoperative pulmonary atelectasis is mainly a complication caused by surgery. It can be treated with bronchoscopy, and antibiotics can be used appropriately to control the infection in patients with infection. And we should actively treat the primary disease. Postoperative atelectasis may be a complication of atelectasis caused by the blockage of the bronchial tubes due to surgery. Bronchoscopic treatment can be performed for patients with postoperative pulmonary atelectasis. Bronchoscopy is indicated in patients in whom the atelectasis is suspected to be caused by an obstruction. During fiberoptic bronchoscopy, the lungs can be reopened by aspirating mucus plugs or thick secretions. If patients with lung atelectasis have concurrent infection or are at risk of infection, drugs such as amoxicillin, cefuroxime, and levofloxacin can be used to control the infection. At the same time, you should actively cooperate with your doctor to treat the original disease. Drugs need to be used under the guidance of the doctor, avoid self-medication.