Positioning guide pipe for bone grinding drill bit

The utility model relates to the technical field of medical instruments, in particular to a positioning guide pipe for a bone grinding drill bit, which comprises a handle main body, a guide pipe and a positioning ring, a drill bit main body is arranged below the handle main body, a positioning plate is arranged in a positioning groove, a sliding groove is arranged on one side of the positioning plate, and the guide pipe is arranged in the sliding groove. The guide pipe is movably connected with the bottom of the handle main body; finally, the drill bit main body cannot deviate during operation, so that the drill bit main body cannot damage other tissues of a patient, and the operation difficulty of medical personnel is reduced; finally, after the medical staff inserts the guide tube into a to-be-operated position of a patient, the push button is poked downwards, so that the positioning plate is expanded, the whole object is fixed at the to-be-operated position, and the medical staff does not need to hold the