Abstract: To prevent film from wrinkling or loosely wrapping around cigarette carton produced by FOCKE-779 Packer,the process of cigarette carton packing and the nature of film shrinking were analyzed.By referring to the principles of hot air heating and pneumatic drying,the original shaping device with double-heater was replaced by a pneumatic heating type shaping device,which was composed of a heater, temperature controller and detector,carton turnover mechanism,guide,etc.The film wrapping on the six sides of carton were uniformly heated and shrank evenly.The results of application showed that after improvement, the appearance quality of cigarette carton was promoted,the qualified rate of cartons sampled from market raised from 95.6% to 98.5%.