Abstract: Selectinghigh-strength modified polyester which could trigger solidification in water environment，water-fast anchorage agent was developed successfully.Research showed that action system of PM-Ⅰ and solidification agent-Ⅰ made solidification effect be the best and anchorage strength the biggest under normal temperature environment，and that pulling resistance could reach above 240kN after 24 hours under anhydrous condition，it could reach above 200kN under water condition.In simulated borehole with seamless steel tube with 28mm inner diameter and 800mm length，anchorage strength of 2 self-made 2330 anchorage agents reached 273kN.This newstyle water-fast anchorage agent was successfully applied in floor-heave main air-return roadway of 2^ndmining region in Jiangjiahe Colliery，which improved construction efficiency，shortened construction time and reduced the influence of water on anchorage force of floor anchored cable.