Lung cancer is one of the most common malignant tumors today, and also one of the malignant tumors that pose a great threat to human survival and health, accounting for the first place among male tumor causes of death and the second place after breast cancer among women. In the past half century, the incidence and mortality rate of lung cancer have been increasing significantly in all countries in the world. The number of new cases worldwide is reported to be increasing at a rate of about 3% per year, with more than 1.3 million new cases of lung cancer, and the increase in the incidence of lung cancer in women is even more pronounced. Since the 1950s, numerous epidemiological studies worldwide have confirmed that smoking is the primary risk factor for lung cancer, and that 87% of lung cancer deaths are caused by smoking. According to scientists, tobacco contains hundreds of complex chemical components, most of which are harmful to humans, including tar, nicotine, phenols, alcohols, acids, aldehydes, and 40 other substances that are toxic and carcinogenic. After lighting, the smoke produced by tobacco contains all the chemical components of tobacco, while adding some harmful substances such as carbon monoxide and tobacco tar than tobacco itself. This is because, in addition to the tobacco itself, in the process of making cigarettes, some cocoa, licorice, sugar, glycerin, glycol and other flavoring, wetting, fragrance-producing and combustion-aiding substances are added to the raw materials. Although these additives are harmless in themselves, they play a role in the combustion process. For example, in the rat’s back coated with cocoa burning smoke oil produced, can grow skin tumors. Glycyrrhetinic acid in licorice after burning, combined with other components, can produce carcinogenic polycyclic aromatic hydrocarbons. Sugar increases the amount of tar when burned with tobacco, and the products of sugar combustion are an important carcinogen in smoke. Glycerol and ethylene glycol in the burning of the substance, not only may make smokers suffer from bladder cancer, and the resulting acrolein can inhibit the trachea and cilia secretions from the lungs, thereby increasing the chances of suffering from bronchitis and emphysema, and aggravate the condition of people suffering from these two diseases. Smoking is not only hazardous to the smoker’s health, but also to the health of non-smokers who passively inhale large amounts of environmental tobacco smoke (ETS), which consists mainly of sidestream smoke and mainstream smoke, which contains higher levels of carcinogenic compounds such as benzene, formaldehyde, hydrazine, N-nitrosamines, and aniline than mainstream smoke. The results of a prospective cohort study in Japan showed that the non-smoking wives of heavy smokers had a higher risk of lung cancer and a dose-effect relationship.Blot synthesized several studies on the relationship between passive smoking and lung cancer and pointed out that non- In China, Gao Yutang et al. studied the causes of lung cancer in women in Shanghai and concluded that the risk of lung cancer due to passive smoking increased with the number of years the husband lived together when the wife did not smoke and the husband smoked, and the risk increased 1.7 times for those who lived together for more than 40 years compared with those who did not smoke. Currently, there are 300 million smokers in China, 740 million people are exposed to secondhand smoke, and 1.2 million people die each year from tobacco-related diseases. Smokers not only damage their own health, but the secondhand smoke they produce when they smoke can also cause harm to nonsmokers, causing malignant tumors such as lung cancer, chronic obstructive pulmonary disease, cardiovascular disease, cerebrovascular disease and other serious diseases, especially the health of pregnant women, babies and children. Studies have shown that women who live with smokers are six times more likely to develop lung cancer; 20% to 30% of lung cancer patients are caused by “secondhand smoke”. The relationship between smoking and the risk of lung cancer is related to the type of tobacco, the age of starting to smoke, the number of years of smoking, and the amount of smoking. Among different types of tobacco, long-term cigarette smoking is the most dangerous, with a relative risk of up to 9.0, while those who only smoke cigars or pipes have a lower risk. The American Cancer Society cohort study of 25 states showed that the relative risk of lung cancer was 15.10, 12.81, 9.72, and 3.21 for those who started smoking at an age younger than 15 years, 15-19 years, 20-24 years, and 25 years or older, respectively. The relative risk of lung cancer was 7.5, 9.5, and 16.6 for those who smoked 5-14, 15-24, and 25-49 cigarettes per day, respectively, and the ratio of excess lung cancer incidence was about 1:20:100 for 15, 30, and 45 years of smoking, respectively, with a fixed amount of smoking. 2. Early smoking cessation can reduce the risk of lung cancer A large number of epidemiological studies have shown that smoking cessation can lead to A large number of epidemiological studies have shown that smoking cessation can lead to a decrease in the incidence of lung cancer, which also shows that smoking increases the risk of lung cancer. National trends in the prevalence of smoking, smoking cessation and lung cancer in the UK since 1950 and comparison with the results of two large sample case-control studies in 1950 and 1990. CONCLUSION: Smokers who quit smoking, even at middle age, have a reduced risk of developing lung cancer later in life. Quitting before middle age reduces the risk attributable to tobacco by more than 90%. If current smokers give up their smoking habits, mortality rates will continue to decline in the near future and in the first half of the 21st century. In contrast, young people who become persistent smokers later in life will significantly affect their mortality in the middle or second half of the 21st century. Studies have shown that quitting at age 50 can reduce the risk of death from smoking-related diseases by 50%, and those who quit at age 30 can avoid almost all smoking-induced deaths Quit smoking methods: 1. Many quitters do not persevere. Therefore, the clinical tendency is to supplement the treatment with medication. There are seven internationally recognized smoking cessation medications, including five nicotine replacement formulations, bupropion extended-release, and varenicline. Nicotine replacement therapy is the replacement of inhaled nicotine with pure medical nicotine; bupropion prolonged release is an aminoketone antidepressant that reduces withdrawal symptoms. Varenicline is a selective nicotinic receptor partial agonist that competitively binds to nicotinic acetylcholine receptors but partially activates the receptors, causing a halving of the receptor response effect, thus reducing smoking cravings and reducing the occurrence of withdrawal symptoms. 2, Chinese medicine to quit smoking Ming Dynasty physician Zhang Jinyue was the first to include tobacco in his medical book, he said in the “Jing Yue Quanshu? Ben Cao Zheng” said that tobacco is an imported product, “the nature of pure Yang, good at moving and good at dispersing, but the Yin stagnation of those who use it as God”, pointed out that tobacco has the efficacy of dispelling wind and dampness, moving Qi and relieving pain, opening the body and awakening the mind, activating the blood to eliminate swelling, detoxifying and killing insects, avoiding miasma, and expelling cold poison, but he did not recognize the harm caused by the long inhalation of tobacco to the internal organs. Later medical doctors gradually recognized the toxic side effects of tobacco, the Qing Dynasty Chen Haozi pointed out that “long serving lung anxiety …… should always be used sparingly”; Wu Cheng “do not live set? Smoke theory” pointed out that “deficiency of people, the most appropriate to quit this”, “no disease of people frequently smoked, the fluid dried up, dark loss of life”, “for more trouble than wine”. The Qing Dynasty Wu Yiluo “from the new herbs” pointed out that tobacco is a poison class, addiction to tobacco can cause “throat wind and sore throat, coughing blood, loss of voice of the disease”, issued a “health people should be far away from the” admonition, a clear expression of the advocacy of tobacco control and the role of doctors to quit smoking first example. Here we recommend several smoking cessation folk remedies to quit smoking soup ① take 30g of fishy grass, 15g each of Dilong and Yuan Zhi, 10g each of Huo Xiang, Peppermint and Licorice, 5g of Ginseng, decoction, 1 dose daily, divided into 5 doses. ② 15g each of roasted aster and roasted dong hua, 12g each of broken paper, Qing xian xia, loquat leaf, Qian hu, poria, orange red, orris, 10g each of Chuan mei, dried eucommia, poppy shell, 9g of dried ginger, 6g of cinnamon, 3g of sage. 1 dose daily, usually 6~9 doses, suitable for people who have smoked for more than 10 years or are addicted to smoking. Smoking cessation tea: ① pumpkin vine 250g, washed and chopped, pounded to extract juice, add brown sugar to the appropriate amount, boiling water to brew future generations of tea. ② 12g each of Dilong and Fishy Herb, 15g of Yuan Zhi, add 500ml of water, decoct to 250ml and let cool. Drink it once in the morning on an empty stomach to start quitting smoking. ③Green tea, peppermint, patchouli, licorice, sugar, boil and drink as tea. Take 8-12 times daily for 2-3 days. ④ Take 250g of fishy grass, decocted in water and drink as tea, 2 doses daily, 1 dose each in the morning and evening. ⑤ Cordyceps sinensis, puzzle nut, pearl, astragalus, wolfberry, codonopsis, maitong, etc. The success rate of quitting smoking was 80.05% when 9g was taken in the morning and afternoon each day. Quit smoking and alcohol: take 60g of fishy grass, 20g of each of Yuan Zhi and licorice, 15g of each of Di Long, Peppermint and Huo Xiang, chopped and soaked in 1000ml of 30%-60% white wine, sealed with a lid for half a month and then drink. Take about 10ml each time, several times a day.