In order to prevent and deal with the soil pollution caused by oil exploitation in an oil field, the effective degradation microbial communities, which were lab selective enrichment cultured from oil-contaminated soil of this oil field, was employed for microbial remediation experiments of oil-contaminated soil. Four methods affecting the degradation rate of oil for three soil samples of high, medium, low pollution concentration were observed under laboratory conditions, and the optimum processing methods for three soil samples were determined. The experimental results showed that the degradation rate of petroleum hydrocarbon for three soil samples in the optimal treatment method could reach 37.93%~75.70% after 33 d bioremediation, indicating that the effective degradation microbial communities, cultivated in this experiment, can remediate the oil-contaminated soil of this oil field. This paper has discussed the feasibility of application of microbial remediation technique in this oil field．