Abstract: In order to improve the running stability of the scraper chain in the transportation pan of the swing type scraper conveyor and to improve the service life of the scraper chain,an analysis was conducted on the running law of the scraper chain in the transportation pan and the working principle of the cam compensation me chanism and a fine design method of the profile curve was provided for the compensated cam. According to the running law of the scraper chain in the transportation pa n,an effective length variation equation of the chain channel was obtained and that was the displacement equation of a follower parts in the mechanism. According to th e design method of the cam mechanism-translation follower piece of the roller,the analytic equation of the cam profile curve was obtained. With a computer simulation C onducted on a mode swing type scraper conveyor,a profile curve diagram and 3D model of the compensated cam for a certain case was obtained. A COSMOS Motion s oftware was applied to the kinematics simulation of a mode swing type scraper conveyor and the simulation results and the actual application conditions were coincided to each other as verified. The results showed that the design method was correct and reliable and could be applied to each swing type scraper conveyor.