It is composed of a combination bracket, a padding combination plate, a frame support guide system, a material support frame, a unloading device, a cutting knife and its fixing device, an upper plate support system, and a cutting speed changing device. The upper surface of the combination bracket is short, and the padding combination plate is horizontally fixed on the combination bracket. There are slits corresponding to the number of cutting knives on the padding combination plate, The frame support guide system is composed of several pairs of guide sliding devices fixed on the combined bracket and several pairs of positioning devices. The guide sliding devices are fixed on both sides of the combined bracket in pairs, and the positioning devices are also fixed on both sides of the combined bracket in pairs. The material support frame is connected to the frame support guide system in a sliding manner, The guiding sliding device in the frame support and guidance system only allows the material support frame to move along the longitudinal axis of the combined support frame, while limiting its lateral displacement. When the material support frame moves longitudinally on the guiding sliding device, the positioning device positions the material support frame. The unloading device is fixedly connected to the cushion composite plate, and there are slits corresponding to the number of cutting knives on the unloading device. The upper plate support system is composed of four vertical columns and a rectangular frame, The top of the four pillars are fixed on the four corners of the rectangular frame, and the bottom of the four pillars is fixedly connected to the combined bracket. The cutting knife and its fixing device are composed of a cutting knife, a cutting knife fixing plate, and a rectangular frame. Several cutting knives are arranged and fixed on the cutting knife fixing plate, and the entire cutting knife fixing plate is inserted and fixed in the fixing grooves on both sides of the lower part of the rectangular frame by pulling. The four corners of the rectangular frame have through holes, The four columns in the upper plate strut system pass through these through holes, and a connecting block is fixed at the Centroid of the rectangular frame. The connecting block fixedly connects the rectangular frame with the lower end of a vertical screw rod. The upper end of the vertical screw rod is connected with the worm gear mechanism in the transmission case of the cut-off speed change device. The cut-off speed change device includes a motor, a gearbox, a control switch, an impactor, a travel switch, a motor The gearbox is fixed at the center of the rectangular frame of the upper plate support system, and the collision block is fixed at the outer side of the rectangular frame in the cutter fixing device near a certain column. Two travel switches and power control switches are installed on the same control board, and the upper and lower ends of the control board are respectively fixed on the same column. The motor drives the worm and worm gear in the gearbox to rotate through a belt, Thus, the vertical screw rod drives the cutting knife and its fixing device to move up and down, and the collision block impacts the travel switch, causing the travel switch to act, controlling the position of the cutting knife movement. The slits on the cutting knife, discharge device, and pad combination plate are all on the same vertical plane