Abstract: By underground test in 12108 Full-mechanized Caving Mining Face with 7m thick coal-seam in Liuta Colliery of Shendong Coal Corporation,the influence of different top-coal caving techniques on minig-to-caving ratio,top-coal recovery ratio,mining speed and efficiency was analyzed.Results showed that after applying full-mechanized caving mining method,roof safe factor increased,initial investment decreased and recovery ratio added,could realize the goal of safe,high-production,high-efficiency and high mining ratio,which provided rational theoretical basis for mining similar coal-seam.