It has been reported that, induced by environmental pollution factors, the incidence and mortality rates of lung cancer in China have shown a persistently high trend. If effective control measures are not taken in time, it is expected that by 2025, the number of lung cancer patients in China will reach one million, becoming the world’s number one lung cancer country. The 2012 China Tumor Registry Annual Report released by the National Tumor Registry Center, after data statistics and analysis of 85 million people in 24 provinces, shows that there are 3.12 million new cases of tumors and more than 2 million deaths in China every year, among which lung cancer has replaced liver cancer, topping the list of cancer incidence and mortality. Statistics from the National Health and Family Planning Commission show that the incidence rate of lung cancer in China is currently growing at an annual rate of 26.9%, and the number of lung cancer patients has doubled every 10 to 15 years in recent decades. The results of China’s third survey on the causes of death of residents also show that the mortality rate of lung cancer has risen by 465% over the past 30 years, replacing liver cancer as the malignant tumor with the highest lethality rate in China. In haze-prone areas such as Beijing and Tianjin, the incidence of lung cancer is significantly higher than the national average. The incidence rate of lung cancer in Beijing rose from 39.56/100,000 in 2002 to 63.09/100,000 in 2011, which is already much higher than the national average. In Tianjin, the incidence rate of lung cancer is about 60/100,000, and 1/5 of the new cancer patients are lung cancer patients, with an obvious trend of rejuvenation; the mortality rate of lung cancer among men and women is the second and the first in the country. The positive correlation between atmospheric pollution and increasingly serious haze weather and lung cancer has been confirmed by many experts and authoritative organizations at home and abroad. The University of Ottawa in Canada has conducted a 26-year tracking study on 180,000 non-smokers in the 50 states of the United States and Puerto Rico, and found that there is a significant correlation between PM2.5 and lung cancer. The research data showed that air pollution is closely related to the production and mortality rate of lung cancer, the more serious the pollution, the more lung cancer and higher mortality rate, and vice versa, the less and lower. every 10 micrograms per cubic meter increase in the concentration of PM2.5, the mortality rate of lung cancer increased by 15-27%, and the mortality rate of lung cancer is higher in those who have lung disease themselves. The study concluded that tiny particles in polluted air can injure the lungs and damage DNA through inflammation, which may be a direct cause of lung cancer and death in non-smokers. The results of the study have now been published in an authoritative international journal. According to the latest data from the International Agency for Research on Cancer (IARC), 223,000 lung cancer deaths worldwide in 2010 were directly related to air pollution. For this reason, the World Health Organization (WHO) classified “outdoor air pollution” as a class 1 carcinogen in 2013, and regarded it as the “most widely spread carcinogen” to date. Studies have shown that PM2.5, when inhaled into the lungs, can directly lead to reduced alveolar elasticity, weakened function, and even induce pulmonary fibrosis, affecting the function of alveolar air exchange. Over time, the decline in lung function and lead to serious organic lesions, and even cause lung cancer. Every year there is a “World Environment Day”, each time there will be a lot of reports, but not many people really realize the harm of environmental pollution, I hope that we can pay attention to the protection of the environment, for their own family for future generations to create a better home.