Abstract: The pollution situation and distribution and factors of ozone and their correlations in Guandu,Kunming were analyzed on the basis of the ozone monitoring dada in 2019. The results showed that the ozone concentration has been rising since March,the highest concentration was from July to October,among which,the peak was found in August. There were the obvious seasonal changes of ozone concentration and the number of days that were over the standard. The most polluted time periods were in spring and summer. The correlation analysis was done between ozone concentration and factors covering air pressure,air temperature,relative humidity,wind speed; precipitation,NO₂,NO,PM₁₀,CO,and PM_{2. 5}. It was showed that ozone concentration had medium active correlation with air temperature,and significant negative correlation with relative humidity and wind speed. There were low relation between ozone concentration and NO₂,PM_{2. 5} etc.. There was no obvious impact on ozone concentration by factors as the sea level changes.