Blocky sponge flat cutting device

The utility model discloses a blocky sponge flat cutting device which comprises a base and a flat cutting machine frame, the flat cutting machine frame is arranged on the upper portion of the base in a sliding mode, a hydraulic mechanism used for adjusting the height of the flat cutting machine frame is arranged in the flat cutting machine frame, a cutting knife belt is arranged in the flat cutting machine frame in a transmission mode, and the lower end of the flat cutting machine frame is fixedly connected with two supporting knife rests. The lower side of the cutting knife belt is in transmission in the supporting knife rests, centering pressing plates are slidably connected into the two supporting knife rests, driven nuts are fixedly connected to the upper ends of the centering pressing plates, a supporting seat is arranged on the lower side of the horizontal cutting rack, and the lower end of the supporting seat is fixedly connected with the two supporting knife rests. And a shifting mechanism used for dr