Special-shaped hard alloy drill bit

The utility model discloses a special-shaped hard alloy drill bit, and belongs to the technical field of alloy drill bits. A water outlet is formed in the side wall of the central column; a fixed connection edge is arranged on the side wall of the drill bit base body; a cylindrical groove is formed in the side wall of the fixed connection edge; a slope surface is arranged on the lower side of the water outlet; the center column with the water outlet is matched with the cylindrical groove to promote water circulation, the discharging groove and the fixed connection edge are used for guiding flow, powder generated when the drill bit is used can be matched with water flow to be rapidly discharged out of a drill hole, and the situation that powder accumulation influences drilling operation of the drill bit is avoided; the engagement piece with the engagement teeth is arranged to be matched with the long screw rod of the fixing ring, so that the connection position of the drill bit is fixed, the drill bit is preve