The machine is specially designed for drying of twisted yarn. It uses high pressure blower and high efficiency heat exchanger to realize hot air circulation and intermittent drainage of steam. Conveyor chain with automatic air pressure tensioning device and stainless steel hanging arm, the hanging arm is designed with anti-drop line, with automatic flip function, effective hanging length up to 1100 mm; The external tubular heat exchanger and special customized thermal insulation materials, as well as the optimized design, make the use of thermal energy very sufficient, saving steam by about 50% compared with the traditional oven, saving about 30％of electric energy, and can effectively guarantee the quality of the yarn and the bulkiness, lubricity, color and vividness. The operation of the device is simple and convenient, the external heat loss is small, and the economy is good; the hand feeling, the bulkiness and the softness of the yarn can be obviously improved, and the disorder of the yarn can be reduced.