The invention discloses a heat pump vacuum coupling far infrared drying device comprising a heat pump system, a vacuum system, a far infrared heating system and a control system. The heat pump system, the vacuum system and the far infrared heating system share one vacuum drying box. The heat pump system mainly comprises a compressor, an external evaporator, an external condenser, an external evaporator and an internal condenser. The control system is connected with the heat pump system, the vacuum system and the far infrared heating system and used for setting and adjusting drying working conditions and achieving online monitoring of the drying process. Multiple layers of storage racks and heating coils are arranged inside the vacuum drying box, and the heating coils are installed on the lower surfaces of the layers of storage racks. A circulating convection fan and a water storage box are arranged inside the drying box. The heat pump vacuum coupling far infrared drying device can achieve advantage complementation and integration of a far infrared radiation drying method, a heat pump drying method and a vacuum drying method, achieve airtight steady state internal circulation dehydration and achieve superheated steam heat transfer drying in a vacuum state. The heat pump vacuum coupling far infrared drying device is low in cost, uniform in drying, efficient, capable of saving energy and free of microbial contamination, and product quality is high.