The invention discloses a split-type cone drill bit, belongs to the technical field of geological drilling devices, and aims at solving the problems of the integrated connection of cone legs and coneseat of the cone drill bit, heavy integrated weight of a cone, high labor intensity of a worker when a single cone is replaced, and the inconvenient replacement of the cone. The cone drill bit comprises a cone seat, the upper ends of the cone seat is provided with three cone legs which are annularly distributed, and cones are rotatably connected with any cone leg; the cone legs are slidably connected with the cone seat, a placing groove is formed in the middle of the cone seat, first inner threads are arranged on the inner wall of the lower end of the placing groove, pressing units which are used for tightly pressing the cone legs are arranged in the middle of the cone seat, and connecting ends which are mutually matched to the first inner threads are connected with the lower ends of the pressing units.