Coughing after lung cancer surgery may be caused by infection, tumor metastasis and after-effects of surgery, which can be treated by antibiotics, chemotherapy, cough suppressants and other drugs. 1. Infection, patients with low immunity after lung cancer surgery are prone to respiratory tract infection, which may cause cough and sputum, etc. It is necessary to use antibiotics with high sensitivity in a timely manner, and at the same time, it is also possible to add cough-relieving and sputum-relieving medicines, which are commonly used, such as western medicines like aminobromoxol hydrochloride, dextromethorphan syrup, amoxicillin and cefuroxime. 2. Tumor metastasis, some patients have tumor metastasis, which forms irritation to trachea and bronchial tube and leads to coughing, and need to be treated with chemotherapeutic drugs such as doxorubicin and platinum. 3. Sequelae of surgery, the lung cancer surgery process causes damage to the mucous membrane of lungs, which will also leave the sequelae of prolonged coughing, in this case, it is necessary to use cough suppressing drugs, such as Strong loquat lozenges and other treatments.