The invention relates to a radiator for a dryer in a washing machine. The radiator comprises an upper base, a bottom base, radiating pipes and a fin set arranged between the upper base and the bottom base. The upper base, the fin set and the bottom base are connected through the radiating pipes. A plurality of sleeve holes used for inserted connection of the radiating pipes are evenly formed in the fin set. The portions, outside the upper base, of the radiating pipes are provided with reducing ends. The reducing ends are connected with capillary pipes. The radiating pipes are further connected with a temperature sensing casing pipe. The upper base is provided with connecting holes corresponding to the sleeve holes. The bottom base is provided with a plurality of slot holes. Each slot hole corresponds to at least two sleeve holes in the fin set. The fin set is composed of a first fin set body and a second fin set body in a spaced mode. The radiator for the dryer in the washing machine has the advantages that the structure is simple, heat produced by the dryer can be evenly distributed, waste heat produced by the dryer can be dissipated in time, the washing machine body is effectively protected, and the service life is prolonged.