The invention relates to a separating ring of a high-gradient magnetic separator. The separating ring comprises a ring body, at least two layers of arc grooves, medium boxes, ore unloaders, ore receivers and an ore feeder, wherein the ring body is arranged on a turntable of the magnetic separator and can rotate along with the turntable; the arc grooves are formed in the periphery of the ring body and used for containing and fixing the medium boxes; the ore unloaders are respectively arrange at the outer circumferences of the arc grooves; the ore receivers are respectively arranged at the inner circumferences of the arc grooves; and the ore feeder is arranged in the ring body. According to the separating ring, by adopting the structure of arranging the at least two layers of medium boxes on the ring body, the thickness of each layer of medium boxes can be greatly reduced; as the number of the layers of medium boxes is increased, a large-volume medium can be mounted in the separating ring, thus effectively enlarging the separating space while ensuring the enough magnetic field intensity, and greatly increasing the processing capacity of the magnetic separator; especially when the magnetic separator equipment needs to be large-scale, the separating ring structure can even effectively ensure that more medium can be conveniently and reliably mounted so as to sufficiently ensure the separating effect; and the structure is simple and reliable, the cost is low and the efficiency is high.