Drill shape for chamfer

The utility model provides a chamfering cutter structure of a drill bit. The bottom end of the chamfering cutter part forms a tip shape, a fried dough twist-shaped hinge ring surface with a uniform external diameter is formed along the length shaping surface of the chamfering cutter part, one side edge forms a swirl groove with a cutting edge facing a rotation direction, and a two thirds groove channel is left at the joint position of the chamfering cutter and an upper groove path of the drill bit, so a radial screw of the chamfering cutter part and the drill bit are combined on a preset height, two tasks of hole drilling and chamfering can be simultaneously completed once, the trouble of realigning the center after a known cutter is used is overcome by the utility model, and the working process of hole drilling and chamfering can be simultaneously completed.