The utility model provides a heat pump -type vacuum freezing medicinal material drying machine is jointly eaten to hot air convection belongs to drying equipment technical field. This desiccator includes vacuum pump, freeze -drying box, compressor, fan, condenser and hot air bellow. Setting valve between vacuum pump and the freeze -drying box, the evaporimeter setting is in freeze -drying box, and capillary, condenser are connected in order to the evaporimeter, and one side links to each other with the fan in the condenser to fill with silica gel, the condenser opposite side links to each other with hot air bellow, and ann has mesh partition in the hot air bellow. Partial water through evacuation after the freezing crystallization of the moisture of vacuum pump in with first batch of material, is got rid of to the compressor in freeze -drying box, arrange this material in hot air bellow again and carry out hot air drying, meanwhile criticize the material with the second and put into freeze -drying box, a repeated last step, so far first crowd of dry material finishes. The utility model discloses effectively reduce drying energy consumption, improve drying efficiency to dry play high quality, article product on intimate terms.