The invention discloses a novel rubber plastic piece cutting device which structurally comprises a cutting device, operating buttons, a display screen, a display screen fixing frame, a handle, an upper cover, a falling curtain fixing rod, rivets, a falling curtain, a lock, a tank door, hinges, non-slip mats, an observation window and an observation window fixing frame. The rear ends of the operating buttons are movably connected with the front end of the cutting device; the inner parts of the operating buttons are electrically connected with the inner part of the display screen; an outer wallof the display screen is adhered to an inner wall of the display screen fixing frame; the top part of the upper cover is fixedly connected with the bottom part of the handle through screws; and the right end of the upper cover is connected with the top part of the cutting device through the hinges. According to the novel rubber plastic piece cutting device provided by the invention, the cutting device is structurally arranged, and a pressing device in the device is matched with the cutting device, so that a cutting surface is smooth without cutting inclined marks, meanwhile, chippings producedby cutting are easily collected so as to be prevented from accumulating and falling into gaps of parts, the protection on the parts is improved, and the service life is prolonged.