The utility model discloses a cooling system for a vertical-ring high-gradient magnetic separator, comprising a closed circulation loop which is formed by serially connecting a circulation pump, a liquid inlet tube, at least one group of conductive wire winding coils, a liquid outlet tube and a condenser in sequence; and a non-scaling cooling medium is filled in the closed circulation loop, and preferably, the non-scaling cooling medium is a cooling liquid. After the cooling system disclosed by the utility model is arranged on the vertical-ring high-gradient magnetic separator, the non-scaling cooling medium is filled in the closed circulation loop of the cooling system, thus avoiding the phenomenon of scaling blockage in a flowing passage caused by the cooling of common cooling water; the cooling system is low in running cost and fault rate; the waste of the common cooling water is avoided; and the working reliability of the cooling system is effectively improved.