show Abstracthide AbstractPolycyclic aromatic hydrocarbons (PAHs) have acute carcinogenicity and genotoxicity and are one of main soil organic pollutants in China. Autochthonous fungal bioaugmentation (AFB) is regarded as a green, sustainable, reliable and promising technology for remediating soil PAHs. However, little is known about the mechanisms of AFB in contaminated soils. There is no evidence whether the added fungi directly participate in the degradation of pollutants, and the influence of AFB on microbial diversity and functional microbial community structures, including both bacterial and fungal communities, are still unclear.