Abstract: Chinese thin and extremely-thin coal-seam resource is rich.It distributes in 84.2% of proven mining areas and its amount riches 67Gt.In recent years,thick and medium-thick coal reserves are decreasing in some mines with mining intensity increasing.In order to ensure balancing mining ability,prolonging mine service age and improving resources mining ratio,high-efficient thin coal-seam mining has become a key urgent problem at present.This paper discussed merits and demerits of thin coal-seam mining methods including blasting mining,conventional-mechanized mining and full-mechanized mining.It mainly introduced new development of thin coal-seam mechanized mining equipments including drum shearer,plough and twist drill in the 11th Five-year Period.It also put forward development tendency of thin coal-seam mining and several urgent and key technologies needed to be developed in the 12th Five-year Period.