The invention relates to a processing tool, in particular to a drill bit for rough processing. The drill bit comprises a drill rod and a drill bit body, wherein the front end of the drill bit body is provided with two cutting edges, a chip discharge groove is formed in the drill bit body, and a chip discharge groove is formed between the rotating tracks of the two cutting edge parts. The drill bit is characterized in that a bullet-shaped alloy head is fixedly arranged in the center of each cutting edge. The drill bit has the advantages that the abrasion of the cutting edges can be effectively reduced, and the service life of a cutter tool is prolonged.