Abstract: Based on the data of pollutant concentration in the main urban area of Chongqing in 2015, with statistical and spatial interpolation methods, the pollutant concentration is analyzed. The results show that: The main pollution in Chongqing area in 2015 was in April, May, July and August, and the main pollutants were PM_2.5, PM₁₀ and O₃; the main pollutants in the remaining months were PM_2.5 and PM₁₀. Spatially, the distribution characteristics of PM_2.5 and PM₁₀ were similar, with the highest concentration near Jiefangbei in Yuzhong District and Nanping in Nan’an District, decreasing to the surrounding, while the spatial distribution of O₃ was opposite.