Automatic medicinal material screening machine

The utility model relates to the field of medicinal material preparation and screening. The automatic medicinal material screening machine comprises a rack, the vibrating screen comprises a rack, a screen frame and a screen, the vibration driving unit comprises a large belt wheel, a transmission belt, a small belt wheel, a motor, a crankshaft and a connecting rod; the feeding and discharging device is characterized by further comprising a feeding and discharging unit and a vibration driving unit mounting frame provided with a guide rod, the feeding and discharging unit comprises a stock bin, afeeding port and a discharging port, the screen frame is provided with a cross beam and a guide hole, the motor is installed on the upper middle portion of the vibration driving unit installation frame, the feeding and discharging unit is fixed to the tail portion of the rack and located above the rear portion of the screen, one end of the connecting rod is hinged to the cross beam, and the otherend of the connecting rod