Abstract: The farmland soils along the main highways around Changchun City was taken as the research object, the environmental risk research was carried out. Through studying the content and types of polycyclic aromatic hydrocarbons (PAHs), the distribution characteristics and sources of PAHs were analyzed, in order to provide references for the treatment of PAHs pollution in Changchun area. The results showed that the total content of PAHs ranged from 0.85 mg/kg to 45.86 mg/kg, the main source of PAHs was biomass combustion source, while petroleum source and petroleum combustion source existed simultaneously.50% of the agricultural soils in the study area had a certain degree of PAHs contamination risk that required attention.

Key words: roadside, polycyclic aromatic hydrocarbons, farmland soil, risk assessment