Abstract: A subject of the invention is a method for transformation of polyolefin wastes into hydrocarbons and a plant for carrying thereof. According to the method, disintegrated polyolefin raw material is subjected in a reactor to the progressive heating to the temperature below 600° C. together with a catalyst chosen from a group comprising cements, heavy metal silicates and resinates and mixtures thereof, where a catalyst is used in an amount below 30% b.w., preferably in an amount of 5-10 % b.w., calculated on the weight of the polyolefin raw material.