The invention discloses a spiral feeding device. According to the spiral feeding device, the two ends of a material guiding screw in a material conveying pipe are movably borne on end plates at the two ends of the material conveying pipe; a feeding port is formed in the top of the part, at the feeding end, of the material conveying pipe, and a discharging port is formed in the bottom of the part, at the discharging end, of the material conveying pipe; the discharging port is provided with a discharging control device used for controlling opening and closing of the discharging port, and a motor is arranged on the outer side of one end of the material conveying pipe; and the material guiding screw can rotate in the material conveying pipe under driving of the motor, and therefore materials entering the material conveying pipe can be conveyed in the direction from the feeding end to the discharging end, and the materials conveyed to the discharging end are discharged out of the discharging port. According to the structure of the discharging control device, the discharging port is connected with a section of discharging hose, clamping mechanisms are arranged on the two sides of the discharging hose, and the clamping mechanisms can clamp the discharging hose so as to close the discharging port or unloosen the hose so as to open the discharging port. The spiral feeding device has the beneficial effects that the structure is simple, the manufacturing cost is low, opening and closing are liable, and the discharging smoothness is greatly improved.