Degradation of styrene by soil microbes in Changzhou region, Jiangsu Province was studied. Experiments were carried out under conditions.simulated to those of submerged and upland soils. Styrene was addied at concentration of 800 ppm. The amount of residual styrene was determined by gas chromatography.The styrene could be degradated by microbes at 300C in both soils metioned above. The kinetic equation of degradation was of the first order. In submerged soil the kinetic regression equation wsa Ĉ=1.03C₀e^-3.46×10-3t while in upland soil Ĉ=0.99C₀e^-2.33×10-2t wheze C₀ is the original concentration of styrene in the soil, Ĉ residual concentration calculated, t degradation time (day). The degradation rate in both soils were compared statistically with each other. In upland soil it was 6.7 times higher than that in submerded soil.styrene coexisted with chlorobenzene, P-dichlorobenzene and m-dichlorobenaxne, its degradation rate was accelerated.Four bacteria strains capable of degradating styrene and using it as a sole source of carbon were isolated from the experimented soil. Identification indicated that two of them were Pseudomonas sp., the other two were Corynebaczeriaam sp. and Arthrobacter sp.