The invention discloses fireproof polyurethane floor coating. The floor coating comprises the following components in parts by weight: 78 to 86 parts of waterborne polyurethane resin, 20 to 24 parts of melamine formaldehyde resin, 15 to 25 parts of polyvinyl acetate emulsion, 16 to 18 parts of paraffin emulsion, 3 to 7 parts of alkylbenzene sulfonate, 6 to 8 parts of vinyl trimethoxysilane, 11 to 14 parts of hydroxyethyl cellulose, 3 to 7 parts of dinonylnaphthalene sulfonic acid, 1 to 4 parts of butyl titanate, 4 to 7 parts of citric acid, 3 to 7 parts of zinc naphthenate, 2 to 4 parts of sodium borate, 5 to 12 parts of a polyurethane curing agent and 10 to 15 parts of a polyurethane dispersant. The fireproof polyurethane floor coating disclosed by the invention is free of solvents, non-toxic and harmless, and environment-friendly to avoid harm of the organic solvents on health of a human body, and can realize completely environment-friendly construction and application. Furthermore, the fireproof polyurethane floor coating has the characteristics of better water resistance and fire resistance, high tinting strength and yellowing resistance, and further is higher in layer surface brightness, brighter in color and luster and more excellent in physical properties.