The utility model relates to a jacking bit structure, which comprises: a three chisel knife with a blade edge on both sides of a sharp corner； a cylindrical portion, one of which has a diameter edge fixed to the chisel and the other end edge is fixed to the chisel a large-diameter end edge of the conical portion； a conical portion having a large-diameter end edge and a small-diameter end edge； at least one opening disposed on the cone-cone slope； at least two support portions fixed to the conical portion a small-diameter end edge, and extending upwardly and bent to be horizontally connected； a screw seat, which is a rectangular or polygonal column shape, one end surface is fixed at the level of the support portion, and the other end surface of the opposite end surface is fixed a fixing member； and a fixing member having a screw body or a nut having an internal thread.本新型乃是一種鑿洞鑽頭結構，其包含：三鑿刀，其尖角雙側邊緣設有刀刃部；一圓筒部，其一口徑端緣固接鑿刀，另一口徑端緣固接於圓錐部之大口徑端緣；一圓錐部，其具一大口徑端緣及一小口徑端緣；至少一開孔，設於圓錐部錐斜面上；至少二支撐部，其固接於圓錐部之小口徑端緣，並向上延伸彎折交接於水平處；一螺拴座，其為矩型或多角柱狀，一端面固接於支撐部之水平處，並該相對端面之另一端面固接固定件；及一固定件，其具螺牙之柱體或具內螺牙之螺帽。
