Abstract: In order to produce a cigarette packet comprising two aluminum foil packs, YB418 cigarette packer was developed on the basis of YB48 hard packer. The flow of inner liner cutting and conveying was redesigned, the positions and diameters of relative shaft holes in gear box were determined, and the gear box, transmission system and execution system for inner liner cutting were designed by means of gear profile shift technology. Test results indicated that the newly designed inner liner cutting device was running smoothly and well lubricated, the temperature rise of bearing was less than 40 ℃, the noise level was lower than 69 dB. No machine failure shutdown and no cigarette packet related to defective inner liner were recorded. The design of the cutting device provides technical support for the development of YB418 double aluminum foil cigarette packer to meet the diversified market needs.