The invention discloses a high performance modified polyurethane coating. The coating comprises isophorone diisocyanate, polytetramethylene ether glycol, alkynyl group-containing polyol, phenylboronic acid, trimethylol propane, N,N-dimethylbenzylamine, cerium hydroxide, acidified carbon nanotubes, organic modified montmorillonite, 2,3-dibromo tripropylborate, triethylamine, 3,3'-diamino-4,4'-dihydroxydiphenylsulphone, 1-sulfolane-3-ethoxycarbonyl-5-hydroxypyrazole, 1,4-bis(dimethylhydroxysily)benzene, a leveling agent, methylsilicone oil, a wetting agent, benzoic acid, propylene glycol, dihydroxyacetone, adipic dihydrazide, liquid styrene butadiene rubber, liquid nitrile butadiene rubber and water. The high performance modified polyurethane coating has the advantages of excellent flame retardation performance, high strength, good heat stability, strong adhesion to a substrate, and long service life.