Fiberboard fixed-length cutting device

The utility model relates to the technical field of cutting devices, in particular to a fiberboard fixed-length cutting device which comprises a cutting table, cutting equipment is installed on the rear side of the upper portion of the cutting table, conveying equipment and a limiting assembly are connected to the two sides of the cutting table, and the limiting assembly is located on one side of the cutting table and comprises a clamping block. The clamping blocks are movably connected to the front portion and the rear portion of one side of the top end of the cutting table correspondingly, open grooves are formed in the inner walls of one sides of the clamping blocks, moving blocks are fixed to the bottom ends of the two clamping blocks correspondingly, rack plates are movably connected to the inner walls of the upper sides and the lower sides of the open grooves correspondingly, and the two moving blocks are fixed to the corresponding rack plates correspondingly. The inner wall of the open groove is movabl