• Petroleum degrading strain has good removal effect on short-chain petroleum hydrocarbons and long-chain petroleum hydrocarbons, and the maximum removal rate reaches more than 95%. It not only effectively reduces the concentration of petroleum hydrocarbons in the soil and its toxic effects, but also restores the physical and chemical properties of the soil, improves the permeability and water permeability of the soil, and restores the balance of the original ecological system of the soil.