The invention provides a biomass charcoal preparation device for chili straw, which includes a support base, a support spring, a controller, a control switch, a lower vibrating fluidized bed body, a hot air inlet, a vibrating motor, a lower assembly frame, and an upper vibrating fluidized bed. Bed body, upper assembly frame, fluidized bed plate, exhaust cylinder, exhaust valve, discharge steel box, feed pipe, feed valve, extrusion feed hopper structure, adjustment control plate frame structure and cooling discharge box structure, the support spring is welded around the upper end of the support base, and the upper end of the support spring is welded with the lower vibration fluidized bed body; the controller is installed on the front part of the upper right side of the support base through bolts, and The front end is inlaid with a control switch. The beneficial effect of the present invention is: through the setting of the structure of the extrusion feeding hopper, the poured pepper straw can be squeezed, thereby extruding excess liquid in the pepper straw, and increasing the drying effect.