Oil pollution of the soil is mainly destroying soil structure and permeability of soil, damage to plant roots, impeded root respiration and absorption, leading to plant death. Second, the oil contaminated the soil aromatic substances toxic to human and animal large, of which benzene, toluene, xylene, phenol and other substances, if a larger concentration of exposure by the longer time will cause nausea, headache , dizziness and other symptoms [1]. In addition, polycyclic aromatic hydrocarbons in oil in the three substances induced a strong role, through the food chain in plants and animals gradually enriched, the enrichment in the soil more harm.