Drill bit special for PCB

The utility model is applicable to the field of design of drill bits special for PCBs and discloses a drill bit special for a PCB. The drill bit comprises a drill blade and a drill handle, wherein the drill handle comprises a clamping portion with the outer diameter smaller than the outer diameter of the drill blade and a connecting portion with the outer diameter equal to the outer diameter of the drill blade, wherein one end of the drill handle is welded to the end away from the clamping portion, of the connecting portion. The drill handle is divided into the clamping portion with the outer diameter smaller than the outer diameter of the drill blade and the connecting portion with the outer diameter equal to the outer diameter of the drill blade, and the one end of the drill handle is welded to the end away from the clamping portion, of the connecting portion, so that on the one hand, the clamping portion enables the drill handle to meet the clamping size requirement of a clamp; on the other hand, the connecting portion can increase the area of welding face between the drill handle and the drill blade, accordingly the fracture resistance capacity of the junction position of the drill blade and the drill handle is strengthened, connecting reliability of the drill blade and the drill handle is improved, the risk that the drill bit special for the PCB breaks on the welding face between the drill handle and the drill blade during drilling is reduced, and the service life of the drill bit special for the PCB is ensured.