Abstract: It is presented a 24m depth excavation supporting that is very near to the surrounding basement. Through thesuccessful using again of the adjacent excavation pile -anchor supporting for new excavation. s pile supporting structure, itwas solved the difficult problem of excavation supporting and saved much engineering expenses. It was monitoreddisplacement of the top of pile and stress of pile reinforcing bar and anchor dragging force, an effective forecasting system ofexcavation displacement was made and measures were also taken to ensure the excavation. s safety after unexpected waterleaking out of fire water pipe and typhoon rainstorm.