Abstract: The toxicity of polycyclic aromatic hydrocarbons (PAHs), the regulations and standards for its residue limits, and its source of presence in leather products have been summarized and analyzed. It is concluded that many countries and organizations have recently made strict restrictions on the level of PAHs in products due to its carcinogenicity. PAHs are unintentionally introduced into leather products mainly through its residue in dyes, fatliquors, solvents and other chemicals. Therefore, the control of PAHs in these chemicals is an effective way to obtain low PAHs level or PAHs-free leather products, thus improving ecological quality safety of leather products, and coping with international green trade barrier risk.