Over -and -under type accounting document flatting mill

The utility model relates to an over -and -under type accounting document flatting mill, including frame, lead screw fixing support and lead screw, be equipped with the base that is located the bottomin the frame and be located the top board of base upside, lead screw fixing support sets up in being located the central point of the crossbeam on frame upper portion puts, the lead screw set up in in the lead screw fixing support, the lower extreme of lead screw with top board fixed connection, be equipped with in the lead screw fixing support and be used for the drive the drive wheel of lead screw up -and -down motion, the outer wall fixedly connected with of drive wheel with the first belt pulley of the coaxial setting of drive wheel, the frame lateral part is equipped with driving motor,driving motor's output be connected with with the second belt pulley of first belt pulley position looks parallel and level, first belt pulley with the second belt pulley passes through the belt and connects, the utility model