The invention discloses a magnetic bearing cooling seat. The magnetic bearing cooling seat comprises a seat body, wherein mounting holes which are used for installing a radial magnetic bearing and a thrust magnetic bearing are formed in the seat body, cover bodies and cooling tanks are arranged on the seat body, the cooling tanks are arranged along the circumferential direction of the mounting holes, and the cover bodies cover the seat body and are used for sealing the cooling tanks; partitions are arranged in the cooling tanks, liquid inlets and liquid outlets are respectively formed in both sides of the partitions and in the inner walls of the cooling tanks, and the liquid outlets are located above the liquid inlets. The magnetic bearing cooling seat has the advantage of simple structure, the temperature of the magnetic bearing can be greatly reduced, the heating condition is improved, and faults caused by heating are reduced.