. In this paper, pile-anchor supporting technology is applied to a deep foundation pit engineering. There are thicker backfills and a multi-story residence at the side of foundation pit. And some luoyangpiles are used for the multi-story residence. Restricting the loader of the ground and arranging two rows of perforated pipes for protecting the louyang-piles are proposed. Then the foundation soils are not necessarg to treal,and the cantilever of piles in row reaches 6 metres. Computation and deformation montoring indicated that the displacement and sedimentation of foundation pit are controll...