The invention discloses a magnetic separator rotating ring. The magnetic separator rotating ring comprises a rotating ring body driven to rotate through a driving mechanism; the rotating ring body comprises an upper ring, a lower ring, a main shaft and multiple separation plates; the upper ring is provided with a feed port; the lower ring is provided with a discharge port; sorting cavities are respectively formed between two adjacent separation plates; magnetic medium boxes convenient for a flushing and unloading device arranged beside the rotating ring body to flush and unload are respectively mounted in all the sorting cavities; the upper ring is provided with rib plates opposite to all the separation plates; the inner end of each rib plate is connected between an upper flat plate and a lower flat plate, and is connected with the outer side surface of a hub; and the outer end of each rib plate is connected with the inner side surface of the upper ring. The magnetic separator rotating ring is reliable in structure and high in overall rigidity, adopts the structures with perpendicular feeding-discharge directions and flushing-unloading directions, can guarantee enough magnetic medium action depth to improve the magnetic separator sorting effect, and guarantees the flushing and unloading effects to realize continuous and reliable equipment operation without blockage.