Puncture device for movable relief mural hanging plate

The invention provides a piercing device for a movable relief mural hanging plate, and relates to the technical field of mural mounting tools, the piercing device for the movable relief mural hanging plate comprises a mounting rack; the drill bit is movably mounted on the mounting frame, the drill bit is provided with a blade part capable of forming a cylindrical hole 1a in the wall surface, a guide hole is formed in the drill bit in the axis direction, and a mounting groove is further formed in the outer wall of the drill bit; the cutter is movably mounted in the mounting groove and is in contact with the two side walls of the mounting groove; the guide rod is matched in the guide hole in an up-down sliding manner, and the bottom end of the guide rod is provided with a driving inclined surface in contact with the cutter; a guide rod drives the interior of a guide hole to slide, the guide rod drives a driving slope to move so as to drive a cutter to extend outwards along a mounting groove, at the moment, a dr