Disclosed is a detection mechanism and a cutting apparatus having the same. The detection mechanism includes a main body fixedly mountable to a beam and being provided with a guide rail; a sliding assembly slidably arranged on the guide rail, where a bottom of the sliding assembly is provided with a first roller; a rotating assembly rotatably arranged on the sliding assembly, where a bottom of the rotating assembly is provided with a second roller, the rotating assembly is provided with a position restoration device configured to urge the rotating assembly toward an initial position, and the rotating assembly is rotatable to a first position by an end of a body ply and to a second position by a lapping joint of the body ply; and a position sensing assembly fixedly arranged on the sliding assembly and configured to identify position information of the rotating assembly.