The invention discloses a polyurethane brilliant white finish. The polyurethane brilliant white finish comprises a main agent, a curing agent and a diluent, wherein the main agent comprises synthetic fatty acid resin, n-butyl acetate, a defoaming agent, a leveling agent, white paste and a coupling agent; the white paste comprises synthetic fatty acid resin, n-butyl acetate, a dispersing agent, titanium dioxide and aluminum oxide powder; the curing agent comprises toluene diisocyanate trimer, hexamethylene diisocyanate trimer, n-butyl acetate; and the diluent comprises n-butyl acetate, dimethylbenzene and propylene glycol methyl ether acetate. According to the polyurethane brilliant white finish, the dense connection of alumina powder and resin molecules is formed by utilizing a laminated structure of alumina powder and the bridging action of the coupling agent. The sand mark covering capability, fullness, hardness and anti-scratching property of the film can be improved, and the purposes of reducing dark bubbles and improving the leveling effect can be achieved.