Abstract: Drying is a process in which the moisture in the material absorbs enough sensible heat and latent heat. Moisture evaporation consumes a lot of heat, and produces a large quantity of secondary steam. According to the principle of high efficiency and energy saving of MVR heat pump,if the secondary steam whose enthalpy is increased by mechanical steam recompression technology, is used as the heat source in the drying process, all latent heat of the secondary steam can be recovered. The exchange of latent heat of evaporation and vaporization with latent heat of condensation was realized in the system, and the energy saving effect was remarkable. This paper summarized the application of MVR heat pump drying, and expounded the advantages of superheated steam as MVR heat pump drying medium, as well as the problems to be considered in the design of MVR heat pump dryer and the selection of compressor. It was pointed out that the inlet and outlet should minimize the non-condensable gas entering into the drying system, avoiding the influence of non-condensable gas on condensation heat transfer in the drying process.