Injection Magnet is made by taking polymer Material as adhesion agent, mixing ferrite powder and then adopting injection molding. It possesses fine magnetic property and process property, high size precise and can be made into various complex shapes. It is applicable to multipole magnetism charge and integrated injection molding. It is widely applicable to permanent magnetism DC machine, magnetic stepping motor, control motor, meter motor, air-conditioner fan electromotor, printer magnetic roller, printer, decoder, coder, etc.