The invention discloses a method for jointly treating polycyclic aromatic hydrocarbon polluted soil and urban organic waste. The method comprises the following steps of mixing, stacking and fermenting domestic garbage, sludge, kitchen waste, poultry manure, polycyclic aromatic hydrocarbon polluted soil, straw, rice shell, wooden chippings, bark, sugarcane residues and mushroom residues; adding an additive consisting of diatomite, active carbon, FeCl3 and magnesia mixture in the mixing and stacking process of the organic waste, the polycyclic aromatic polluted soil and the waste biomass. By adopting the method, the soil and organ organic solid waste can be simultaneously treated, so that the independent treatment cost can be greatly reduced. Materials are convenient to acquire, the method is simple, effective and rapid, the treated soil can be directly used for the agricultural planting after the organic fertilizer or other additive is directly added, the polycyclic aromatic hydrocarbon polluted soil is treated, a great amount of domestic garbage, sludge, kitchen waste and livestock manure in the city also an be treated, and the land occupied by the urban garbage treatment can be greatly reduced.