The utility model discloses a magnetic separator, be the device, run through including the electric cabinet of control, pipe -line system, magnetism magnetism is the barrel of device, and supports magnetism is the frame of device and barrel, barrel inside is equipped with an at least baffle, the baffle will the barrel is separated for two at least fore -and -aft separation cylinder in edge, every separation cylinder's upper end and lower extreme all be provided with with the export that pipe -line system connects, every upper portion and lower part in the separation cylinder are equipped with magnetic pole head, lower magnetic pole head, every respectively it selects separately the chamber to form between interior last magnetic pole head that corresponds of separation cylinder and the lower magnetic pole head, it is equipped with the magnetic medium to select separately the intracavity. The magnetic separator magnetic separation is efficient, the selection do not effectual, area is little, can effectively reduce energy loss, practices thrift the cost.