The invention discloses a clothes dryer, and the clothes dryer comprises a machine body, a fan assembly, and a heat exchange system. One side of a work cavity of the machine body is opened, and the upper part of the interior of the work cavity is provided with a hanger rod assembly. The heat exchange system is provided with a first inlet and a first outlet which are communicated with a first heat exchange cavity of the heat exchange system, and a second inlet and a second outlet which are communicated with a second heat exchange cavity of the heat exchange system. The first inlet is communicated with a cooling air inlet, and the first outlet is communicated with a cooling air outlet. The second inlet is communicated with a circulating air outlet, and the second outlet is communicated with a circulating air inlet. A first fan enables external air to be led into the first heat exchange cavity from the first inlet and to be discharged from the first outlet. A second fan enables wet and hot air in the work cavity to be led into the second heat exchange cavity from the second inlet and to be discharged to the work cavity from the second outlet through heat exchange. According to the embodiment of the invention, the air course of the clothes dryer is unobstructed, and the clothes driver is quick and uniform in drying, is small in operation noises, is high in drying efficiency, and facilitates the cleaning of soft flocks and collection of condensate water.