Application: used to automatically separate stacks of packaging bags or cards and convey single piece onto the conveyor belt so as to facilitate the coding machine or laser machine to spray print or spray etch the date of production, lot number, anti-fake mark, pattern, etc., and thus reduce the trifles of manual paging, make full use of the advantages of high-speed spray printing of coding machine and laser machine and improve spray printing efficiency, meanwhile, it is equipped with the function of intelligent counting and automatic stop to facilitate production management.