Biodegradation of persistent organic pollutants in soils and bioremediation of the contaminated soils are internationally hot topics in the frontier field of environmental remediation science and technology. This review focused on PAHs degrading microorganisms, and microbial degradation mechanisms, and their application to bioremediation. In addition, prospects were discussed of exploitation and application of combined bioremediation engineering and technology for PAHs contaminated soils.