Abstract: To avoid the shortcomings of carton out of position, high machine failure rate and inconvenient maintenance during production, the carton collector was improved by downward sliding carton conveying means and other upgrading measures. The sliding cigarette cartons were received by a collector and transferred to a case sealing machine via a belt conveyor, which reduced the frequency of carton conveying chain plate stoppage and ensured normal running. By adopting cam drive, the reliability of carton elevating was guaranteed. The elevation and discharge of carton were controlled with servo motors, while carton monitoring and controlling systems were controlled with PLCs. The results of application showed that the number of carton conveying system stoppage reduced from about 340 to less than 40 times/month, the number of cases needed to be filled manually reduced from over 15 to 2-5 case/machine per day. The maintenance work decreased, while the machine efficiency increased.