Polypropylene plate cutting device

The polypropylene plate cutting device comprises a mounting table, middle guide frames fixed to the middles of the two ends of the mounting table and a plurality of supporting frames arranged at the corners of the periphery of the mounting table, and the top of each supporting frame is rotationally connected with a transmission roller; wherein a pair of first screws running at the same speed in the same direction are installed between every two opposite transmission rollers, one transmission roller is sleeved with a reverse rotating device, and according to the polypropylene plate cutting device, the pair of first screws rotate at the same speed in the same direction, the sliding frame can be driven to drive the cutting saw to linearly walk above the mounting table; one transmission roller shaft is fixedly connected with a motor, and the motor is sleeved with a gear, so that the propelling plate and the cutting saw move in opposite directions on the movement of the two gears, the propelling plate and the cutt