Perpendicularity detection device

The utility model relates to the technical field of perpendicularity detection devices, in particular to a perpendicularity detection device which comprises a sleeve rod and a guide rod, the outer wall of the guide rod is connected with the sleeve rod in a sliding mode, the top of the guide rod is connected with a wire box, and a wire rope at the bottom of the wire box is connected with a wire hammer. And the left side of the bottom of the guide rod is in threaded connection with a vertical threaded block. A user rotates a transverse threaded block, so that a sleeve rod is located on the rightmost side of a base, then the transverse threaded block is reversely rotated, then a sliding rod is pulled, the sliding rod drives a limiting block box to move leftwards, a limiting block is disengaged from a supporting block, meanwhile, the sliding rod drives a spring to stretch, and then a connecting block is rotated; when the perpendicularity detection device is used, the sleeve rod drives the round rod to anticlockwi