Reinforced hot-pressing columnar diamond complex impregnated drill bit

The utility model discloses a reinforced hot-pressing columnar diamond complex impregnated drill bit. The drill bit comprises a drill bit steel body, a plurality of supporting bodies arranged at the end of the drill bit steel body, gauge protection welding layers for welding the drill bit steel body and the supporting bodies and water gaps, the water gaps are located between the adjacent supporting bodies, the gauge protection welding layers are located between the drill bit steel body and the supporting bodies, and a plurality of diamond composites are arranged in the supporting bodies. The diamond composites are arranged in a two-ring or three-ring mode and distributed in the supporting body, and the diamond composites account for 55%-80% of the area of the working bottom lip of the drill bit; sMD40 diamond is adopted as the composite diamond in the diamond composite body, and SMD30 diamond is adopted as the composite diamond in the supporting body. The drill bit is unique in structure, can drill in a hard,