The invention discloses a screw rod discharging device which comprises a discharging pipe, an adjusting valve, an adjusting bolt, a receiving hopper, a receiving box and a base. The opening of the tail end of the discharging pipe is of a sealed structure, a discharging opening is formed in the wall of the tail end of the discharging pipe, and the adjusting valve is arranged in the discharging opening. The receiving hopper is arranged below the discharging opening, and the longitudinal section of the receiving hopper is in a Y shape. A longitudinal adjustment baffle is arranged in the receiving hopper which extends into the receiving box. A receiving plate is arranged in the receiving box. Multiple receiving cavities are formed above the receiving plate, and partition plates are arranged between the receiving cavities. Adjustment plates and multiple horizontal sliding rods are arranged in the receiving cavities. Discharging doors are arranged in the bottom side walls of the receiving cavities. Multiple guide grooves are formed in the base, multiple rows of pulleys are arranged at the bottom of the receiving box, and the pulleys are embedded in the guide grooves. The receiving plate is designed to be arc, so that collision force between screw rods and the box and between the screw rods is reduced, and threads on the screw rods are not prone to being damaged.