The treatment of cough in lung cancer patients depends on the cause of the cough.1. Lung cancer patients can cough severely or even hemoptysis because the cancer itself can stimulate the respiratory tract, so strong central cough suppressants, such as codeine phosphate tablets, can be given to stop the cough.2. If the cough is caused by lung cancer complicated by pneumonia, the patient often coughs up a lot of sputum, especially yellow pus sputum. Because cough suppression will make the sputum difficult to be discharged and aggravate the lung infection, at this time, we should give sputum-suppressing drugs, such as amylin, myrtle oil, etc., to thin the sputum and make it easy to be discharged, and at the same time, we should use sensitive antibiotics for anti-infection treatment to eliminate the cause of the disease. 3. Lung cancer in the bronchial cavity, which obstructs the airway and causes patients to cough violently, at this time, no cough suppressant will have good effect, and we should eliminate the tumor quickly to relieve the compression and obstruction. 4.Radiotherapy, using radiation to kill tumor cells rapidly. Minimally invasive interventions can also be used to embolize the blood supply vessels of the tumor to necrosis and dissolve the tumor or put in a stent to hold open the compressed trachea. The most fundamental method is still to adopt effective anti-tumor treatments, such as chemotherapy and targeted therapy, to eliminate the tumor and relieve the cause of the disease.