The development of obstructive pneumonia in lung cancer is caused by the tumor compressing the airway and causing the respiratory secretions not to be excreted in time. The most important means to treat obstructive pneumonia is anti-tumor therapy, such as chemotherapy is preferred for small cell lung cancer. If adenocarcinoma can be treated surgically, surgery is recommended; if not, genetic testing is recommended to give targeted therapy if there is a suitable target, and chemotherapy if there is no suitable target. If the adenocarcinoma is squamous, then surgery is recommended; if it is not suitable for surgery, then chemotherapy and radiotherapy are recommended. The ultimate treatment for obstructive pneumonia is anti-tumor therapy.