The invention discloses a polyurethane coating material formula, wherein the components comprise, by weight, 162 parts of neopentyl glycol, 113 parts of adipic acid, 51 parts of Benpiansanjiasuanxian,1.5 parts of titanium tetraisopropanolate, 146 parts of xylene, 396 parts of acetone, 8 parts of toluene phosphoric acid, 9 parts of toluene diethanolamine, 23 parts of triethylamine, 14 parts of ethylenediamine, 447 parts of deionized water, 31 parts of barium sulfate, 16 parts of aluminum tripolyphosphate, and 6 parts of modified zinc phosphate. According to the present invention, the ratio design is extremely reasonable, the construction process is simple, and the paint film cannot shed.