Abstract: Evaluation and Analysis of the air quality data of Jurong City in 2018 were conducted.The main pollutants affecting urban air quality were PM₁₀ and PM_2.5.AQI statistics showed that the city's fine weather ratio is 74%.The proportion of good days in the third quarter was the highest and the lowest in the second quarter.It showed that the air quality in Jurong City was the best in summer and the air quality in spring and winter was heavily polluted.