Drill

The utility model discloses a drill bit, and belongs to the field of cutting tools. The milling cutter comprises a cutter handle and a cutter head arranged on the cutter handle, and the cutter head comprises multiple sets of cutter holders circumferentially distributed on the outer side of the cutter handle and cutters arranged on the cutter holders; the cutting knife comprises a knife body arranged on the knife holder, a main cutting edge arranged at the bottom end of the knife body, an auxiliary cutting edge arranged on the side face of the knife body and a first scribing edge arranged on the knife body and located between the main cutting edge and the auxiliary cutting edge. The main cutting edge comprises a main cutting face and an auxiliary cutting face arranged on the back side of the main cutting face, a second scribing edge is arranged on the auxiliary cutting face, and a receding set is arranged on the tool apron. According to the drill bit, manpower resources are saved, the production cost of an ent