Abstract: Plant oil has the ability to remove high-concentration polycyclic aromatic hydrocarbon (PAH) from contaminated soil through leaching. To realize the further environmental removal of the PAH, two kinds of plant oil containing PAH were treated with the advanced oxidation process, i.e., the combination oxidation by ozone, hydrogen peroxide and ultraviolet radiation. The effects of some operational parameters on PAH removal were investigated, and the results showed that ozone has the ability to oxidize PAH in plant oil, and its oxidizability to anthracene/fluoranthene is higher than to phenanthrene. A highest PAH removal rate up to 81% is obtained in plant oil when treated with 10%-concentration hydrogen peroxide in combination with UV used at pH=3, and, under the same conditions, the PAH removal rate is 76.5%, that is fairly good for treating the plant oil with high-concentration PAH for 8 hr.