The magnetic separator is a powerful magnetic separation device, which makes the upper layer easy to separate. The number and size of the magnetic separation device can ensure the separation of the blank. The magnetic separation device is fixed on the rotatable telescopic arm. The telescopic arm is mounted on the telescopic arm. On the linear guide of the table, the upper and lower, left and right, and front and rear directions can be adjusted. During the production and replacement, the position of the magnetic device can be manually adjusted by the telescopic arm.