Paperboard flattening device for corrugated paper

The utility model relates to the technical field of paperboard processing, and discloses a corrugated paper paperboard flattening device which comprises a machine top block, a machine base is fixedly installed at the bottom of the machine top block, an upper power device is fixedly installed in an inner cavity of the machine top block, and the left side of the upper power device penetrates through the machine top block and extends into the machine top block. The paperboard flattening device comprises an upper power device, a rotating shaft is movably installed on the left side of the upper power device, an upper eccentric gear is fixedly installed on the outer surface of the rotating shaft, a special-shaped shell is movably installed on the outer surface of the upper eccentric gear, and the two sides of the upper eccentric gear penetrate through the special-shaped shell and extend to the special-shaped shell. The upper eccentric gear and the lower eccentric gear in the special-shaped shell are driven by the u