According to the causes and pathogenesis of lung cancer in traditional medicine,the principle of syndrome differentiation and treatment,the research achievements of modern medicine,we discuss the idea and method of syndrome differentiation and treatment of lung cancer by integrated traditional and western medicine.We believe the treatment of lung cancer can be taken from several aspects:strengthening body essence and eliminating pathogen;individualized treatment according to the principle of syndrome differentiation and treatment;combining differential symptoms and diagnosis of diseases according to achievements of lung cancer treatment in traditional medicine;choosing suitable treatment by integrated traditional and western medicine considering the different stage of lung cancer.