In the dried ventilated warehouse, the active aluminium hydroxide can improve connectivity and machinability of aluminium hydroxide and resin, which brings it good flame-retardant and filling functions; therefore, it can improve the flame-retardant and smoke-eliminating effect of such primary composite materials as plastic and rubber, and strengthen its electric leakage resistance, arc resistance and wear resistance. It can be widely applied to electrical cable materials, rubber, wire and cable insulating layer, sheath layer, insulating material, conveying belt, etc.