The invention relates to a magnetic composite fluid clustered polishing head. The magnetic composite fluid clustered polishing head comprises a connecting bracket, magnet rotating shafts, a liquid carrying disc rotating shaft, a liquid carrying disc rotating shaft bottom end cover, a belt wheel mechanism, a V belt, a liquid carrying disc and a driving motor; three magnet rotating shafts are mounted in the connecting bracket; each magnet rotating shaft is provided with an adjustable magnet and an eccentric distance mechanism for rotating the adjustable magnet, and is connected with the driving motor; the lower end of the connecting bracket is connected with the liquid carrying disc rotating shaft for carrying magnetic polishing liquid to rotate through the liquid carrying disc rotating shaft bottom end cover; the liquid carrying disc rotating shaft is connected with the belt wheel mechanism through the V belt; and the belt wheel mechanism is connected with the driving motor. The magnetic composite fluid clustered polishing head can effectively control the material removing rate in the polishing process through adjusting the rotating speed of the three magnet rotating shafts and the magnetism of magnets carried by the magnet rotating shafts and changing the rotating eccentric distances of the magnets. The magnetic composite fluid clustered polishing head has the advantages of compact structure, small size and light mass.