The abilities of a bacterial consortium STK and a fungus Agrocybe sp. CU-43 to degrade PAHs were investigated. Consortium STK could completely remove 100 ppm phenanthrene as well as pyrene in liquid medium within 7 and 14 days, respectively. Fluorene could also be degraded down to 4.48% within 14 days. Fluoranthene was failed by STK with 94.33% remaining. Agrocybe sp. CU-43 was able to degrade phenanthrene, fluorene, fluoranthene, and pyrene to 23.45%, 28.85% 69.10% and 76.52%, respectively, in 14 days. In soil experiment, the coculture of Agrocybe sp. CU-43 and bacterial consortium STK was able to completely degrade 100 ppm pyrene and phenanthrene within 21 days. Fluorene and fluoranthene remained were 27.88% and 17.67% respectively after 14 days of incubation. When PAHs concentration in soil was raised to 200 ppm and 400 ppm, all PAHs were degraded to less than 10% in 21 days by the coculture more efficient than that of either STK or Agrocybe sp. CU-43 alone. These results suggested that the cocultivation of a fungal / bacterial strain may exert a positive effect on the PAHs degradation in soil.