Magnetic separator is suitable for the wet magnetic separation of the materials whose granularity is below 3mm such as magnetite, pyrrhotite, calcined ore and ilmenite and can also be used for removing iron from the materials such as coal, non-metal ore and building material. The magnetic system of magnetic separator is a compound of fine ferrite material and rare earth magnets and the average magnetic induction intensity of the surface of the cylinder is **0~**0mT.