Impurity cleaning device for discharge port of vibrating screen

The utility model belongs to the technical field of vibrating screens, and particularly relates to an impurity cleaning device for a discharge port of a vibrating screen, which comprises a main box, the discharge port is fixedly mounted on the right side of the main box, a driving motor is fixedly mounted on one side of the front side of the main box, and a transmission rod is fixedly mounted at the output end of the driving motor. A movable block is fixedly installed on the surface of the transmission rod and is in an oval shape. When a driving motor drives a transmission rod to rotate, a screen plate can vibrate up and down through rotation of a movable block so as to achieve the screening purpose, through arrangement of a rotating rod and a transmission wheel and a transmission belt at one end of the transmission rod, the rotating rod can be driven to rotate while the transmission rod rotates, and therefore a cleaning brush is driven to rotate in a discharging opening; and the whole device is driven by the