We analyzed the characteristics of volatile organic compounds (VOCs) and their key active components in Jiangsu province using the VOCs data monitored in urban areas of Jiangsu's 13 cities from August 13th to September 30th,2019.The results showed that the daily concentration of VOCs in Jiangsu ranged from 8.83×10^-9 to 45.11×10^-9,with alkanes being dominant and followed by aromatics,alkenes,and alkynes.The concentration of VOCs in 13 cities ranged from 7.85×10^-9 to 30.52×10^-9,which was highest in Xuzhou due to the location of its monitoring station as well as its industrial structure.When the ambient ozone concentration was excellent,good,light pollution,and moderate pollution,the total VOCs were 14.96×10^-9,17.96×10^-9,25.85×10^-9,and 25.11×10^-9,respectively.On the whole,the VOCs concentration was higher when the ozone was in pollution level,and the proportion of alkyne in VOCs increased with the aggravation of ozone pollution,indicating the close relation between ozone generation and human activities.Species including m/p-xylene,ethylene,toluene,propylene,isoprene and o-xylene,were screened out by weighting,which were the key species that had large and extensive impact on ambient VOCs of Jiangsu province.