Abstract: Abstract: Based on the engineering research background of short-wall cemented filling in F7401E working face of Coal Mine, this paper systematically studies the key technologies of filling system, roadway mining width, filling support and filling technology by means of theoretical analysis and field measurement. The research shows that the planning and implementation of ground pulping station and two filling routes are effective. It ensures the source of filling materials; when the design width of supporting roadway is 4.5m and the design width of pillar roadway is 5m, the stress concentration can be effectively avoided; on-site efficient excavation is carried out by supporting equipment such as "intelligent comprehensive excavator + explosion-proof forklift + 40T slider", with the help of "self-propelled high-efficiency jet machine" and fully automatic hydraulic slurry retaining wall. The goal of "three-day digging a branch lane and filling a branch lane" has been achieved by blocking the upper and lower seals separately. The monthly single advance reaches 570m, and no obvious deformation has been observed by surface displacement and roof separator. The research results can be used as "three-under-top" resources, especially in irregular fault tectonic areas. The efficient and economic recovery of block resources has high application value.