Multiple flutes chamfering cutter has multi-functional processing capability. Milling bottom plane, top chamfering, bottom chamfering, vertical cubic chamfering, side milling V-groove, top and bottom chamfering at the same time. The multi-flute design chamfering cutter doubles the feed rate of chamfering, and the high positive angle design of the insert does not produce secondary burrs in chamfering. The blade is designed with four edges, so the cost is greatly reduced and the chamfering cost on the machine is almost negligible.