Disclosed is an efficient decontamination floor cleaner. The raw materials of the cleaner include, by weights: 4 to 6 parts of methyl hydroxybenzene, 3 to 7 parts of dibutyl phthalate, 4 to 8 parts of cocamido propyl hydroxyl sultaine, 6 to 9 parts of hydrogenated castor oil, 5 to 10 parts of spices, 12 to 17 parts of polystyrene latex, 4 to 8 parts of sodium carbonate, 6 to 7 parts of beewax, 1.5 to 2.3 parts of diethylene triamine pentaacetic acid (DTPA) iron ammonium salt, 2 to 4 parts of bactericide B, 3 to 5 parts of eucalyptus oil, 8 to 14 parts of lacquer thinner, 7 to 12 parts of sodium alcohol ether sulphate, 0.1 to 0.2 part of flavour, 20 to 24 parts of sodium hydrogen carbonate and 5 to 10 parts of fatty alcohol-polyoxyethylene ether. The floor cleaner has the advantages the fine decontamination and bacteriostasis effects are achieved, the floor lustre is enhanced, floor ageing is prevented effectively, and the service life of the floor is prolonged.