Drill bit connecting seat for geological drilling machine machinery

The invention discloses a drill bit connecting seat for geological drilling machinery, and relates to the technical field of geological drilling related equipment. The device comprises a mounting base, an inverted cone round opening is formed in the middle of the lower end face of the mounting base, a drill rod is arranged in the inverted cone round opening, three clamping blocks which are annularly and evenly distributed and connected with the peripheral side of the drill rod are arranged in the inverted cone round opening, and air cylinders are arranged at the positions right above and behind strip blocks; three arc plates which are annularly and evenly distributed are arranged on the upper surface of the assembling plate, adjusting springs are fixed to the opposite side walls of the multiple adjusting blocks, and movable bent plates are arranged above the lug plates. The air cylinder pushes the clamping block to move, the drill rod is rapidly clamped or replaced, the device can be suitable for drill rods w