Tobacco contains hundreds of complex chemical components. There are more than 40 carcinogenic substances and more than 10 cancer promoting substances in the smoke produced by smoking. The compounds that do the most harm to human body are carbon monoxide, tar, toluic acid, arsenic, etc., while nicotine is an addictive substance. Behind the huge tobacco profits in our country, there is a great health hazard caused by smoking-related diseases, mainly including lung cancer, chronic obstructive pulmonary disease (COPD), hypertension, arteriosclerotic heart disease, diabetes, mental illness, etc. Among them, the incidence of lung cancer has risen to the first place among tumors in our country.