By using the 868 groups meteorological elements and air quality data of Changshun county from January 2016 to July 2018, this paper analyzed the situation and variation characteristics of air quality, explored the correlation between the four meteorological elements and air quality index (AQI) of Changshun county, meanwhile obtained the optimal regression equation with the stepwise regression analysis by using the SPSS software. Air quality grades I and II accounted for 97.7% of the total during the monitoring period, the proportion of lightly polluted days is 2.5%. The first three primary pollutants are PM2.5 (35.7%), O3 (32.6%) and PM10 (29.5%). The AQI index is negatively correlated with the four meteorological elements, in which the daily humidity and the daily precipitation have a more significant impact on air quality.