Pitch changing mechanism of cutting machine

The utility model relates to the field of cutting machines, and discloses a cutting machine pitch changing mechanism which comprises a main body, a supporting rod is fixedly connected to the upper surface of the main body, a long screw rod is rotatably connected to an inner cavity of the supporting rod, the outer wall of the long screw rod is sleeved with a hydraulic press in a threaded mode, a cutting plate is fixedly connected to the bottom end of the hydraulic press, and a supporting frame is fixedly connected to the upper surface of the cutting plate. A threaded rod is rotatably connected to an inner cavity of the supporting frame, a sliding long block is rotatably connected to the outer wall of the threaded rod, a second cutting block is fixedly connected to the outer wall of the sliding long block, a sliding rail is fixedly connected to the outer wall of the cutting plate, a baffle is fixedly connected to the outer wall of the sliding rail, and a second connecting column is slidably connected to the out