Carbide drill bit is a kind of equipment for drilling engineering. A drill bit used in core drilling. The steel cylindrical drill body gets its name from the inlaid tungsten carbide. The shape of the cemented carbide cutting tool and the number of inlaid welding on the drill bit, the arrangement method, and the different inlaid welding angles are called bottom edge, inner edge and outer edge to ensure the gap between water flow and powder discharge. The upper part of the bit body is threaded to connect the core pipe, the side part of the bit body is provided with a water groove, and the bottom lip surface is also provided with a nozzle. Both the sink and the nozzle ensure the flow of the flushing fluid, and achieve the functions of removing rock dust and cooling the drill bit. In order to increase the gap when drilling into the clay layer and shale formation, ribs are welded on the inner and outer side walls of the hard alloy drill bit, which is called a ribbed drill bit. Needle-shaped carbide self-grinding drills can be used in hard formations with high abrasiveness. Generally, cemented carbide drill bits can drill into stratum with rock drillability of grade II to Ⅶ; needle-shaped cemented carbide drill bits can drill into rock of grade VI to Ⅷ.