Drill bit

The invention relates to a drill bit which comprises a drill bit connecting part at the upper end, a drill bit shaft part on the middle part and a drill bit tip part at the bottom end, wherein a connecting hole is formed on the drill bit connecting part; the drill bit tip part has a conical structure; at least one first bulge edge is longitudinally arranged on an outer wall of the drill bit tip part; the first bulge edge extends to the tip part from the upper end of the drill bit tip part; at least one rotating head is longitudinally arranged on the outer wall of the first bulge edge. The drill bit can solve the problems of the present rotating drill bit that the well hole wall is unstable and cannot be drilled and the pile-forming quality is unqualified even if the hole is drilled in the rotary excavating bored pile construction in a high backfilling area. 种钻头，包括上端的钻头连接部、中部的钻头轴部以及底端的钻头尖端部，钻头连接部上设有连接孔，所述钻头尖端部为锥形结构，在钻头尖端部外壁纵向设有至少1个第凸起棱，第凸起棱从钻头尖端部的上端延伸至尖部，第凸起棱外壁纵向设有至少1个旋转头。本发明能解决现有旋挖钻头在高回填区进行旋挖钻孔灌注桩施工中，井孔孔壁不稳、不