VOCs emission from gas stations has been one of the key areas of atmospheric O3
pollution prevention in China due to high species activity and great ozone generation potential. However, there are still many problems in the prevention and control of VOCs Pollution in gas stations due to the wide distribution of gas stations in China and the large number of VOCs leakage points. Based on the analysis of China's refined oil consumption by province in 2019 and the environmental geographic information of provincial capital cities, this paper quantitatively calculated the VOCs emission factors and emissions of gas stations by provinces in China Mainland in 2019 by using the method in the technical manual for the compilation of anthropogenic air pollutant emission inventory (AP-42) recommended by the U.S. Environmental Protection Agency (EPA). The results showed that there were great differences in VOCs emission factors of gas stations in various provinces in China. The VOCs emission factor of gas stations in Haikou city is 1.35 times difference compared with that of Lasha city. In 2019, the VOCs produced by gas stations in the mainland of China was about 414 8 thousand tons. The VOCs mainly concentrated in 11 provinces in southern China (Guangdong, Jiangsu, Hubei, Sichuan, Hunan, Zhejiang, Anhui and Fujian) and provinces with large regional population (Henan, Shandong and Liaoning), accounting for 64.54% of the total emissions. The VOCs emission reduction potential of gas stations in China is still very great. When the vapor recovery efficiency of gasoline reaches 90% or above, the VOCs emission of gas stations will drop to less than 544 thousand tons. Considering the different control measures, the VOCs of gas stations in China will also drop by 250-300 thousand tons. The research results could provide reference for China superviser to strengthen the VOCs pollution control of gas stations in the 14th five-year plan.