Primary bronchogenic carcinoma (lung cancer for short) is one of the common malignant tumors and has jumped to the top of malignant tumors in recent years in China. The incidence and mortality rate of lung cancer is the only malignant tumor that has increased significantly year by year for 60 consecutive years. The rising incidence of lung cancer is mainly seen in men, but now the number of female patients has increased dramatically, and the ratio of men to women has decreased from 8:1 to 2:1. Patients with lung cancer who have access to surgery only account for 15% to 20% of the total number of patients, so most of them are already in advanced stage when they are diagnosed. For example, irritating dry cough (cough without sputum often induced by external stimuli such as cold air, after exercise, odor, respiratory infection) that lasts for more than 2 or 3 months, coughing sputum (mucus sputum, blood in sputum), chest pain (irregular vague or dull pain), chest tightness, shortness of breath, and recurrent inflammation of the lung. In particular, middle-aged and elderly people over 40 years old should be highly alert to the possibility of lung cancer if they have a high-pitched metallic cough sound. Conventional treatment is ineffective or recurrent cough, fever, constant drilling chest pain, hemoptysis, wheezing, hoarseness, mostly advanced symptoms, examination can see a large amount of pleural effusion or pericardial effusion, spontaneous pneumothorax, lack of appetite due to tumor toxins and consumption, and due to infection and pain, may show cachexia (extreme emaciation, skin and bones, anemia, weakness, bedridden, mental decay, general exhaustion, etc. ). Lung cancer is one of the malignant tumors with the fastest growing incidence and mortality rate and the greatest threat to the health and life of the population. In the past 50 years, many countries have reported a significant increase in the incidence and mortality of lung cancer, with men accounting for the first place in incidence and mortality of all malignant tumors, and women accounting for the second place in incidence and mortality. The cause of lung cancer is still not completely clear, but a lot of information shows that long-term heavy smoking has a very close relationship with the occurrence of lung cancer. Studies have proven that long-term heavy smokers are 10 to 20 times more likely to develop lung cancer than non-smokers, and the younger the age of starting to smoke, the higher the chance of developing lung cancer. In addition, smoking not only directly affects one’s own health, but also has a negative impact on the health of the surrounding population, leading to a significant increase in the prevalence of lung cancer in passive smokers. The incidence of lung cancer is higher in urban than rural areas, which may be related to urban air pollution and the presence of carcinogenic substances in the smoke. Therefore non-smoking should be promoted and urban environmental sanitation should be enhanced.