Based on the filling mining of 833 sharp inclined coal seam working face of Yongdingzhuang Mine， the reasonable filling mining， recovery plan and roadway support ensured the normal advancing of gangue filling and working face， improved the gangue filling rate and mining rate， the experience of gangue filling was summarized， a set of sharp inclined coal seam soft hidden support working face filling mining technology was put forward， realized safe and green mining， without the gangue up-load and mining with filling， took a good control of the surrounding rock deformation， improved the economic and social benefit.