Automatic equipment and method for picking impurities in traditional Chinese medicinal materials

The invention discloses automatic equipment and method for picking impurities in traditional Chinese medicinal materials. The automatic equipment comprises a vibration screening device, an electromagnetic roller device, an image recognition picking device and a conveying device. The vibration screening device comprises a screening box body, and a feeding port and a discharging port are formed in the upper end and the lower end of the screening box body correspondingly. An upper screen and a lower screen are movably arranged in the screening box body; a collecting box is arranged at the lower end of the lower screen; the side end of the screening box body is connected with a motor through a crank-link mechanism to achieve reciprocating vibration of the screening device; and the conveying device is arranged at the lower end of the discharging port and comprises a conveying belt and a driving device, and an electromagnetic roller device and an image recognizing and picking device are arranged on the conveying be