Pile foundation calculation model of high-piled wharf is established applying an axial spring on a certain position of the pile body. According to the calculation formula of axial stiffness coefficient of pile in Design and Construction Code for Open Type Wharf on Piles, a calculation method for the stiffness coefficient and applied position of the axial spring in different situations is given. By the method, the axial stiffness of pile foundation model in imaginary fixing points method and m-method calculation mode are same and consistent with the code. Combined with this method, two spatial finite element models for a high-piled wharf engineering example are established by imaginary fixing points method and m-method respectively. The comparison of the calculation results show that axial force of pile shaft, bending moment at pile top and the internal forces of each component in superstructure are similar. It proves that the suggested method is feasible and reasonable, which serve as references for structure calculation of high-piled wharf.