Preparation method for transference resistance leather dye

The present invention discloses a preparation method for a transference resistance leather dye, wherein an active group-containing dye, an anti-yellowing isocyanate compound, a hydroxyl group-containing polymer, a compound containing a hydroxyl group and a hydrophilic functional group, a chain extender, and the like are subjected to polymerization to obtain a product of the present invention. The dye prepared by the method of the present invention has the following advantages that: performance is stable, and transference resistance of products dyed by the dye is excellent. The method of the present invention has advantages of simple synthetic route, molecular weight adjusting, easy functionality control, and the like. The dye prepared by the method of the present invention can be used for leather dyeing, and colorant components in leather coating and synthetic leather coating.