The utility model relates to the technical field of membrane paper slitting device, especially membrane paper fixed
diameter round sheet slitting device, including frame, frame top fixed connection support, frame top symmetry sets up two groups of telescopic motion's half circle clamping base, two groups of half circle clamping base top sets up the liftable motion's cylinder clamping base, two groups of half circle clamping base combination and cylinder clamping base size are consistent, still include the rotary lever, cylinder clamping base inside rotary connection rotary lever, rotary lever one end bottom fixed connection slitting knife, cylinder clamping base inside sets up the liftable motion's down pressure frame, and down pressure frame is C type, the utility model discloses membrane paper fixed
diameter round sheet slitting device, first through cylinder clamping base and two groups of half circle clamping base's cooperation, to the stable all -round clamping of membrane paper, then utilize slitting knife to carry out accurate round sheet slitting to membrane paper, finally through down pressure frame and
cut well round sheet down pressure to two groups of half circle clamping base inner chamber bottom, and this device can improve the slitting quality of round sheet significantly.