Abstract: A remediation case of petroleum hydrocarbon-contaminated site in a gas station was introduced,and regarding to the pollution extent and remedy requirement, thermally enhanced soil vapor extraction（TSVE） combined withmicrobial degradationapproach was applied for the in-situ remediation. 10 extraction wells ,5 injection wells and 8 monitoring wells were built in the remedy site.Firstlysoil vapour extraction（SVE）was operated to remove volatile organic compounds (VOCs) in the soil,and after 20 d of operation, the total petroleum hydrocarbon (TPH) concentration of the site was lower than the screening value of the Class II land of the national standard (GB 36600);Then TSVEwas carried out to extract semi VOCs in the soil. Finally degrading bacteria was injected todegrade the residual pollutants in the soil, and after 45 d, TPH concentration was lower than the screening value of the Class I soil ,which achieved the remedy goal.The results showed that TSVE combined with microbial degradationwas an efficient and green remedy approach，providing practical reference for the similar site remediation.

Key words: thermally enhanced soil vapor extraction, microbial degradation, petroleum hydrocarbon, in-situ remediation