Multi-tip and edge group drill

The utility model relates to a multi-tip multi-edge group drill. The drill point of the utility model is composed of a drill-point tip (24), two arcuate tips (25), and two chip dividing tips (26), two outer edges (27), two circular-arc edges (28), two inner edges (29), a chisel edge (31) and a chip dividing edge (30). For making the group drill be suitable for the mechanical sharpening of industrialization, the cross section of a chip dividing groove (22) which is milled on the back tool surface (32) on one side of the outer edge is a V-shaped slot which is provided with a circular-arc bottom, and the circular-arc radius R of the circular-arc edges is enlarged to make the ratio of the circular-arc radius R of the circular-arc edges and the diameter d of the drill bit be 0.11 to 0.15. the shape angle of the inner edges 2 phi< tau > can be also reduced to 131 DEG to 133 DEG, and/or the chisel edge angle psi can be enlarged to that the psi is larger than 65 DEG and is smaller or equal to 70 DEG for rising the centering ability of the drill point. The sharp angle of the outer edges 2 phi can also be reduced to 121 DEG to 123 DEG for rising the durability.