High-strength polyester fiber flexible mesh with advantages of big mesh size, flexibility lightsome, strong tensile resistance, easy operation, could one-time hang net without connection, with good laying effect. Jizhong Energy, Gequan Mine 11912 fully mechanized caving working face late mining with high-strength polyester fiber flexible mesh technology was taken as example, high-strength polyester fiber flexible mesh in late mining technology, construction steps, network implementation of operating procedures were discussed, comparing metal mesh with flexible network economic technology, the result showed that high-strength polyester fiber flexible mesh could realize rapid and safe retracement, with obvious technical and economic benefit.