Device and method for blending granular preparations

The invention discloses a device and a method for blending granular preparations. According to the device for blending the granular preparations, blending information and parameters are input in a control system; a dispensing system located on the surface of a console dispenses the doses of the granular preparations; a conveying and allocation system is located at the bottom of the console; the dispensing system dispenses the doses of the granular preparations; the control system controls the conveying and allocation system to periodically turn to a predetermined position; granules in the dispensing system directly fall into the conveying and allocation system; the conveying and allocation system conveys the granular preparations to a packaging system; and the packaging system packages the granular preparations to complete blending. The device is simple to operate, high in packaging accuracy, high in efficiency, and beneficial to blending and packaging for large-batch granular preparations.