Aiming at the complex interaction between piles and soils，the pile foundation design method of Recommended Practice for Planning,Designing and Constructing Fixed Offshore Platforms-Working Stress Design（API RP 2A-WSD）is adopted to analyze the internal force of pile foundation for high-pile pier and abutment wharf,and the calculation results are compared with those of elastic embedding method.In the models,P-Y curve spring is used to simulate the normal resistance of soil at pile side,T-Z curve spring is used to simulate the axial resistance of soil at pile side and Q-Z curve spring is used to simulate the axial resistance of soil at pile end.The following conclusions are drawn:for the in friction piles,the axial force of pile body decreases with the increase of soil depth;the bending moment of pile body has two reverse bending points,and the maximum bending moment occurs at the pile head or the soil end for 4d~6d;the maximum bending moment calculated by API method is smaller than that calculated by elastic embedding method.