The invention provides a linear movement output device. The linear movement output device comprises a drive mechanism and a slide block, wherein the drive mechanism is of a rotatable structure; multiple drive pieces uniformly distributed along a circumferential direction of the drive mechanism are arranged on the drive mechanism; the slide block can slide along a straight line; multiple baffle plates are uniformly distributed on the slide block in a sliding direction; the drive pieces are used for abutting against and matching with the baffle plates along with the rotation of the drive mechanism and sliding from the first ends of the baffle plates to the second ends of the baffle plates so as to push the slide block to slide along the straight line; and before one drive piece is separatedfrom the second end of the corresponding baffle plate in contact with the drive piece, the other drive piece adjacent to the drive piece abuts against and matches with the first end of the other baffle plate on the slide block. Therefore, the linear movement output device is simple in structure, convenient to manufacture and install, low in production cost, and capable of continuously outputtingunidirectional linear movement.