Abstract: Based on the monitoring data of national control monitoring stations in the urban area of Kunming in 2013-2020, the temporal and spatial distribution features of atmospheric pollutants were analyzed. The results showed that during the period of 2013-2020, the annually-averaged concentration of O₃ in the urban area of Kunming generally showed an upward trend, and the annually-averaged concentrations of other pollutants showed a downward trend. The annually-averaged concentration of O₃ increased by 4.1%, while that of SO₂ dropped by 67.9% and other pollutants dropped by 35.0%-55.0%. The proportion of days of primary pollutants exceeding Level 1 or above the standard of Ambient Air Quality Standards (GB 3095—2012 ) indicated that O₃ instead of PM_2.5 had become the primary atmospheric pollutant in Kunming. The highest concentration of O₃ appeared in spring, followed by summer, and the lowest in autumn, the concentrations of PM₁₀ and PM_2.5 were generally high in spring and winter but low in autumn, and as for SO₂, NO₂ and CO, the highest concentrations appeared in winter and lowest in summer. But the variation ranges in four seasons of SO₂ and NO₂ were smaller than that of other pollutants. O₃ in spring and summer and PM_2.5 in spring and winter were the key points of air pollutants control in Kunming. The daily variation of O₃ presented single peak distribution, CO, NO₂, PM₁₀ and PM_2.5 presented double peaks distribution, but the variation of peak-valley of PM₁₀ and PM_2.5 concentrations were not distinct. The peaks of NO₂, PM_2.5, PM₁₀ and CO were identical to morning rush hours, the peak of O₃ usually appeared during 14:00-15:00, and the concentration of SO₂ was higher in the morning than in the afternoon. As for spatial distribution patterns, remarkable distinctions existed for different pollutants. The concentrations of SO₂, PM_2.5, NO₂, PM₁₀ and CO of western stations were 54.5%, 20.0%, 17.9%, 14.6% and 2.4%, respectively higher than those of eastern stations. On the contrary, O₃ concentrations in eastern stations were 9.0% higher than that of western stations. The difference of SO₂, NO₂ and O₃ concentrations between eastern and western stations had narrowed down year by year, and this might be caused by the weakening of the impact of pollution transmission from Anning Industrial Park.