Based on decreased coal reserves, complicated geological conditions and many irregular working face caused by fault, protecting pillar and boundary coal, techniques of face angle adjusting, spining, continued support, reduction frame and high grade support were used in 94604 fully mechanized mining face of Fengfeng Group Dashe Mine, together with adopting mining scheme of rotary continuous mining. The practice showed that resources of boundary coal and protecting pillar under complicated mining geological condition were exploited, and mining area of protective seam was increased to 30,000 m2, which changed intense connecting passive situation of working face in Dashe Mine.