Self-cleaning drill bit

The utility model relates to the technical field of drill bits. The utility model relates to a drill, in particular to a self-cleaning drill. The defects that in the prior art, personnel operation isinfluenced, and device performance is influenced are overcome. Including a substrate, a lifting shaft and an air cylinder are installed on the upper surface of the base plate through bolts. The lowersurface of the base plate is sequentially connected with a mounting plate and a connecting plate through screws. A servo motor is mounted on one side of the mounting plate through a screw; the outputend of the servo motor is connected with a rotating main shaft through a coupler; a drill bit is fixed at the end part of the rotating main shaft through a screw; drilling process, the outer cover canbe pushed to slide downwards under the driving of the air cylinder; and the outer portion of the machining station is blocked, chippings are sucked into the box body in cooperation with the exhaust fan, the chippings are cleane