The invention provides a plant fiber plate stirring machine which comprises a rack and a stirring barrel arranged on the rack. A discharge port and a pair of sliding grooves are arranged in the lower portion of the stirring barrel, wherein the sliding grooves are located in two sides of the discharging port respectively. A discharging port opening and closing door is arranged in the sliding grooves. A motor and a speed reducer driven by the motor are arranged on the discharging port opening and closing door. Walking devices are arranged on an output shaft of the speed reducer. The plant fiber plate stirring machine has the advantages of being scientific in design, convenient to discharge and strong in applicability.