Lightweight large-diameter face milling cutter head

The invention relates to the field of cutting machining equipment, in particular to a lightweight large-diameter face milling cutter cutterhead which comprises a circular base, a cutterhead body, a plurality of cutter teeth and a plurality of blades, and the cutterhead body is arranged on the periphery of the circular base; the cutter head is made of aviation aluminum 7075; a plurality of weight reduction cavities are formed in the cutter head, and the radius of the cutter head is 125 mm; the cutter teeth and the blades are in one-to-one correspondence, the blades are connected with the cutter teeth, the blades take tungsten-based hard alloy as base materials, and titanium carbonitride and aluminum oxide as cutter coatings. The weight of the cutter is reduced through cutter materials and by adding the weight reduction cavity, so that the disc milling cutter is conveniently mounted, and the load of the main shaft is effectively reduced; the single milling width is effectively increased by reasonably increasing