Operation of variable frequency stepless motor for automatic pillow packing machine,Through v-belt drive tooth chain rotation speed by variable speed chain in the stepless transmission speed, the different speed and then by synchronous belt to the planetary differential mechanism, the paper membrane transport length adjustment, the gearbox output shaft through the chain transmission driven in paper film roller conveying paper film, paper film output length setting on the tooth chain speed governor of manual operation. And in the packaging process by the photoelectric tracking color label for monitoring. At the same time, the gearbox is also driven by multiple chains to realize the packaging. Conveyor belt, paper wheel, pressing wheel, cutting knife and finished conveyor belt movement.