Abstract: Pile-supported pier of a harbor was designed as one of three types of structure:project of sloping dike,project of one row of inclined supporting piles,project of two rows of inclined supporting piles.The construction process of pile-supported pier was simulated by a plane finite element method(FEM)with a elasto-plastic constitutive relation of soil.The horizontal displacement in front of pier and distribution of axial force and moment of piles were studied.Two representative sections were chosen to compare different schemes,the supporting layers of which were weak-weathered granite and clayey soil respectively.The results reflected commendably the stress and distortion character of the pile-supported pier.Hereby,some rules about the pile-soil interaction in the pier structure were summarized.