Miniature drill bit

A micro drill bit comprises a drill tip part, the drill tip part comprises two short chisel edges which are arranged in a central symmetry mode, at least one first cutting edge with the gradient different from that of the short chisel edges is arranged at the ends, away from each other, of the short chisel edges, and the gradients of the multiple first cutting edges are different. According to the micro drill bit, a chisel edge of a traditional drill bit is changed into a short chisel edge with different gradients and at least one section of first cutting edge, so that the length of the traditional chisel edge is reduced, the drilling centering capacity is improved, meanwhile, the first cutting edge is used for increasing the core thickness of a micro drill, and the strength of the micro drill is enhanced while the centering effect of the micro drill is improved. 一种微型钻头，包括钻尖部，所述钻尖部包括中心对称设置的两段短横刃，位于所述短横刃相互远离的一端设置至少一段梯度不同于所述短横刃的第一切削刃，设置有多段所述第一切削刃的，多段所述第一切削刃间的梯度不相同。该微型钻头将传统钻头的横刃改为梯度不同的短横刃和至少一段第一切削刃，以减小传统横刃的长度，提高