Lung infection after lung cancer surgery can be treated by intravenous drug drip, physical therapy and dietary adjustment under doctor’s guidance and according to the severity of the disease. 1. Intravenous drug injection: When lung infection occurs after lung cancer surgery, first of all, pathogenic microorganism examination should be carried out to clarify whether the lung infection is viral or bacterial. After clarifying the cause of disease, intravenous drug treatment should be given under the instruction of doctor. 2. Physiotherapy: lung infection after lung cancer surgery may cause dyspnea, hypoxia, respiratory failure and other symptoms in serious cases, so oxygen therapy, respiratory therapy and other physiotherapy means can be used under the guidance of doctors. 3. Dietary regulation: patients with lung infection after lung cancer surgery often have poor resistance, in the course of treatment, they should maintain balanced diet and provide moderate nutrition for the body. When lung infection occurs after lung cancer surgery, patients should contact the hospital in time and actively cooperate with doctors under their guidance.