Distribution characteristics of PAHs in the green-belt soils collected from Yan’an Road Viaduct, the Middle Ring Road and the Outer Ring Road in Shanghai were studied in the paper. Results showed that the total content of 16 kinds of PAHs in soils ranged from 538 μg/kg to 21932.8 μg/kg, which were already contaminated with PAHs if judged by the corresponding standards from Poland, Canada and other countries, in which 4-6 ring PAHs accounted for about 90% of the total PAHs. Moreover, the varying pollution degree of PAHs indicated that the road age and heavy vehicles using diesel contributed mainly to PAHs contamination. Correlation analysis indicated that soil organic matter was a main influential factor of PAHs distribution in the soils.