Aluminum hydroxide flame retardant, with non-toxic, good stability, high temperature does not produce poisonous gas, also can reduce the plastic the advantage such as the amount of smoke during burning, and dewatering endothermic temperature is low, about 235-350 ℃, so in the beginning of plastic burning flame retardant effect is remarkable, aluminum hydroxide in the adding amount was 40%, significantly slow the PE (polyethylene), PP (polypropylene), PVC (polyvinyl chloride) and ABS (propylene eyes/butadiene/styrene copolymer), such as the pyrolysis temperature, good flame retardant and smoke reduction effect. Add 60% aluminum hydroxide flame retardant polyolefin can be used as a building material and automobile, ship interior decoration materials.