Abstract: The working principle and movement characteristics of differential mandrel mechanism in H1000 ultrahigh-speed cigarette packer were analyzed. The mandrel mechanism incorporated cam differential drive and means of alternate movement, the cam mechanism produced speed difference and in parallel with main drive via planet gear differential mechanism to implement intermittent movement with low impact and noise at high-speed. Two sets of mendrels worked alternately to improve the working efficiency of the equipment. The results showed that with gentle acceleration/deceleration and low impact, the differential mandrel mechanism satisfied the requirements of ultrahigh-speed packer for continuous and stable running, the noise at fullspeed running was 79 dB (A) in contrast with 83 dB (A) of a medium speed packer. Through the actual running over three years, the failure rate was zero and no obvious wear was observed.