Jaw distractor with vertical biaxial extension function

The jaw distractor with the vertical double-shaft extension function comprises a first shell and a positioning assembly, and the outer wall of one side of the first shell is connected with the first shell through a rotating mechanism. According to the jaw distractor with the vertical double-shaft extension function, a worker can rotate a gear to push a rack to drive a sliding shaft to move in a first shell and in the first shell, so that the position of a fixed distracting plate can be movably adjusted, and meanwhile, the worker can limit the gear through a limiting bolt to prevent the gear from moving; meanwhile, a worker can stir a reset pull rod in the locking assembly to extrude a limiting spring to finish supporting of a locking block, then the locking block is clamped into a locking groove under pushing of a telescopic spring, and therefore the positions of the sliding shaft and the positioning assembly can be further fixed; the device can effectively prevent the extension distance of the device from be