The dangers of smoking are well known to all. Smoking is the number one killer of human health, with 2.5 million deaths worldwide each year. Consciously develop good personal hygiene habits of non-smoking, not only good for health, but also a noble public health moral concept of embodiment. In the smoking room, especially in the winter environment with closed doors and windows, the room is not only filled with carbon dioxide from the human body, there is also carbon monoxide from the smoker’s whistle. According to the measurement, in the cigarette smoke contains 3% to 6% of carbon monoxide, will make people feel headache, tiredness, reduced work efficiency, more serious is in the smokers spit out the cold smoke, tobacco tar and nicotine content than the smokers inhale the hot smoke content 1 times more benzo(a)pyrene 2 times more, carbon monoxide 4 times more, ammonia 50 times more. Benzo(a)pyrene and coal tar are carcinogenic, especially the former. Some data show that the incidence of lung cancer in long-term smokers is 10 to 20 times higher than in nonsmokers, the incidence of laryngeal cancer is 6 to 10 times higher, the incidence of coronary heart disease is 2 to 3 times higher, the incidence of circulatory system is 3 times higher, and the incidence of bronchitis is 2 to 8 times higher. A survey of 1,000 families found that more children under 16 years of age in smoking families suffered from whistle disease than in non-smoking families. 33.5% of children under 5 years of age in non-smoking families had whistle symptoms, while 44.5% had whistle symptoms in smoking families. Smoking has special risks for women, smoking women who are using oral contraceptives, will increase the chance of heart attacks and lower extremity venous thrombosis; smoking pregnant women’s fetuses are prone to premature birth and underweight, reduced immune function in infancy and childhood, prone to disease; according to statistics, pregnant women who are passive smokers have significantly higher rates of infant teratogenesis. Smoking is harmful to people and themselves, so they should consciously develop good health habits of not smoking.