The caliper gauge comprises a base plate, one end of the side surface of the base plate is provided with a supporting plate, the side surface of the supporting plate is provided with a threaded column, one end of the threaded column far away from the supporting plate is movably connected with a nut, one side of the nut close to the supporting plate is movably connected with a moving block, and the upper end of the moving block is provided with a circular groove in a penetrating manner. First springs are arranged between the moving blocks and the supporting plates, moving grooves are formed in the upper surfaces of the two ends of the bottom plate in a penetrating mode, limiting columns are movably connected into the moving grooves, moving plates are symmetrically arranged on the two sides of the limiting columns, limiting blocks are arranged at the lower ends of the sides, away from the limiting columns, of the moving plates, and two second springs are symmetrically arranged on the side faces, away from the limiting columns, of the moving plates; first detection plates are movably connected below the moving grooves, fixing grooves are formed in the upper surfaces of the first detection plates, limiting grooves are formed in the two sides of the lower ends of the fixing grooves, and second detection plates are arranged on the side faces of the lower ends of the moving blocks. The detection plate can be adjusted and replaced.