The invention provides a low-temperature circulating air flow device for worsted production. The low-temperature circulating air flow device includes a yarn steaming box, a moving assembly and a circulating air flow device. The yarn steaming box is a half-sealed internal pressure thin-wall container. The left end of the yarn steaming box is embedded in a seal cover, the seal cover is provided withthe moving assembly, and the circulating air flow device includes an infrared heating pipe, a suction fan and an air feeder. The left end of the yarn steaming box is fixedly connected with the inletend of the suction fan, the top of the right end of the yarn steaming box is fixedly connected with the outlet end of the air feeder, the outlet end of the suction fan is fixedly connected with an airguide pipe, and a three-way pipe is fixedly mounted at the left end of the air guide pipe and fixedly connected with the yarn steaming box and the inlet end of a fan. Through the circulating air flowdevice, the air speed in the yarn steaming box is uniform, the generation of a heating blind area is avoided, the yarn twist is balanced, yarn quality is improved, the yarn color is durable, the production efficiency is greatly improved while claims for compensation caused by yarn skew are reduced, manpower resources are saved, and the cost is reduced.