Abstract: Microbial technology is a promising method for removing polycyclic aromatic hydrocarbons (PAHs) from contaminated soil. The PAHs degradation efficiency in the biopile treated contaminated soil was studied. 4 biopiles were set up, the control group (1#), the sufactants Tween 80 added one (2#), the ventilated one (3#) and the one mixed with the sufactants Tween 80 and ventilated (4#). The results show that after 9 days, the total PAHs in all experimental groups decreased by more than 80%. The low molecular weight PAHs (2-3 rings) levels decreased the most (91%) after 9 days, yet the medium and high molecular weight PAHs (4-6 rings) levels may take longer time to be degraded, and only 60% was degraded. The removal rates of the medium and high molecular weight PAHs were not significantly promoted via adding surfactant or ventilating after 80 days treatment. At the 31 days, the 3# and 4# groups were both mixed with the indigenous bacterial consortium enriched from the studied contaminated soil. The microbial community, surfactant and ventilating did not significantly promote the PAHs degradation rate in the studied period (80 days), although the dehydrogenase activities at 80 days of the 3# and 4# groups increased 7-fold and 9-fold respectively as compared with 41 days. At the 80 days, the dehydrogenase activities of 4# group reached 10 740 μg·g^-1·h^-1. This study verified the effectiveness of biopile in treating PAHs contaminated soil, explored the different treatement strengthening strageties for improving the remediation effect of biopile on PHA contaminated soil, and provided important information for the application of biopile in remediation of PAHs contaminated sites.