Abstract: The distribution of PAHs in the ambient air was reported in Xuzhou in the autumn.Soxhlet method was used for sampling and GC/MS for measurement,and 14 kinds of PAHs were found adsorbed on TSP,out of which the content of Chy,BbF of 4-ring compounds of PAHs is in significant priority.The mass concentration of BaP is beyond standard between 0.1 and 2.2 times in two of the three sites.The mass concentrations of BaP and PAHs were in linear correlation and so were mass concentrations of PAHs and TSP.