The invention relates to a leather dye formulation. The raw materials in the formulation are composed of 5-15% p-phenylenediamine, 1-5% aniline, 1-10% pigment, and 5-15% epoxy resin. , sodium chloride 3‑9%, ethylene glycol 2‑3%, water 1‑5%, hydrochloric acid 11‑19%, antiseptic and antifungal agent 5‑7%, fatty alcohol polyoxyethylene ether 3‑5%, glucose Sodium triacetate 3-5%, disodium aminotriacetate 3-9%, lauric acid diethanolamide 2-4%, the leather dye agent prepared by this method has no film-forming, non-sticking board, dull and bright, dyeing The back leather is not shiny, soft but not hard, thereby ensuring that the quality of the leather remains unchanged; in addition, the cost of the composition of the invention is low, and the production process is simple.