The contents and sources of 15 USEPA priority PAHs in agricultural surface soils(0~20 cm) of typical districts,Wuxi and Taizhou in the Yangtze River Delta were studied.The results showed that the PAHs pollution was heavy in agricultural soils of Wuxi district and the sum of 15 PAHs contents ranged from 1 058 to 9 500μg kg- 1.The composition of PAHs was mainly 4 to 6 rings and the main sources were petroleum and combustion of petroleum,grass,wood and coal.In agricultural soils of Taizhou district,the PAHs pollution was light and the sum of 15 PAHs contents ranged from 128 to 604μg kg^-1.The composition of PAHs was mainly 3 to 6 rings and the main sources were petroleum and petroleum combustion.