Abstract: Four remediation processes were designed and experimentally validated by coupling surfactants-washing, biodegradation, and chemical oxidation techniques for polycyclic aromatic hydrocarbons (PAHs) contaminated soil from an abandoned coking plant. The results showed that a single soil-slurry bioreactor degradation process could achieve 58.64% PAHs degradation in 21 days for the actual coking-contaminated soil. The degradation process of surfactants-washing+chemical oxidation+soil-slurry bioreactors could achieve 65.68% degradation in 26 days, but the prepositive chemical oxidation would inhibit the biodegradation effect. The degradation process of dry-sieving+surfactants batch washing+chemical oxidation could achieve an 85.36% degradation effect, which could effectively shorten the degradation time to 13 days, but the residual PAHs in the soil were closely bound with soil particles, and the degradation effect of chemical oxidation was still difficult to meet the degradation efficiency of more than 90%. The collaborative degradation process based on bioaugmentation of wet-sieving+surfactants batch washing+soil-slurry bioreactors+chemical oxidation could achieve a 95.32% degradation effect in 29 days and achieved the target value of soil remediation. The collaborative degradation process based on bioaugmentation integrated the advantages of various remediation technologies and realized the optimization of the combination of remediation technologies, which provided a feasible process path for the remediation of PAHs in contaminated soil of coking industry.