Patients with postoperative lung infections are usually able to achieve clinical cure. The majority of postoperative lung infections in patients undergoing general surgery abdominal surgery are due to gram-negative bacilli. Third-generation cephalosporins should be preferred, and anti-anaerobic drugs such as ornidazole should be used in combination if necessary. Possible postoperative abdominal infections should also be treated aggressively, and lung infections usually resolve as abdominal infections are controlled. The effect of general antibacterial drugs is poor, sputum culture and blood culture should be performed to find out whether the infection is caused by specific bacteria, in order to select sensitive antibacterial drugs to guide the use of drugs. If necessary, Tylenol and antifungal drugs can also be used. If a more significant pleural effusion is present, a puncture to place a tube for drainage should be considered. Encourage coughing up sputum along with internal drainage, and if very severe dyspnea is present, resulting in respiratory failure, treatment in the intensive care unit via ventilator and pressure ventilation is required if necessary.