Abstract: In order to solve the technical problem of safety and high efficiency fully mechanized mining in large dip angle thin coal seam, Sichuan Huayingshan Guangneng Company independently developed MG200/495-QWD traction cantilever double drum shearer, ZY3500/07/15Q type anti-skid plate-type beam shield hydraulic support, SGZ730/2x200 type double-chain double-drive scraper conveyor and other fully-mechanized coal mining equipment, and industrial test was carried out in Leigongshan Coal Mine 1121 working face. Test results show that “three-machine” complete sets of equipment is reasonable, mining machinery automation degree is increased, the comprehensive mechanical mining of inclined thin seam is successful implementated with the inclined angle of less than 45°and the thickness less than 1 m during the trial period. Working face safety advancing is 580 m with 16.5 million t of cumulative production of coal, and the maximum monthly production of working face is 30 kt.