The utility model provides a bundle dispersing machine, which is applied to tobacco machinery. The bundle dispersing machine comprises a frame, a roller rotation component, a machine body base, a material receiving hopper, a feed hopper, a barrel component and a speed reduction motor, wherein the machine body base is fixed above the frame; the barrel component is fixed above the machine body base; the roller rotation component is arranged inside the barrel component; the upper end of a roller rotation shaft of the roller rotation component is connected with the speed reduction motor; the roller rotation shaft is driven to rotate by the speed reduction motor so as to drive the roller rotation component to rotate in the barrel component; the upper side of the barrel component is fixedly provided with the feed hopper; the lower side of the barrel component is communicated with the material receiving hopper; a plurality of long bundle pins are uniformly distributed on the outer surface at the periphery of a roller body of the roller component; a plurality of fan blade plates are fixed at the top end of the roller body; and a plurality of short bundle pins are uniformly distributed on the inner surface at the periphery of the barrel component. The bundle dispersing machine has a simple structure, high production capacity, low energy consumption, a small occupied area and a high product index, is reliably operated and is convenient to use and maintain.