In order to study the effect of whole temperature difference on pile internal force after the completion of high-piled wharf,a three-dimensional finite element model is established to analyze the temperature deformation law combined with engineering examples.It is considered that the temperature deformation constraints of the oblique pile and vertical pile on the upper platform can be neglected.The platform is in a free temperature deformation state with temperature divergence center whose horizontal displacement is zero.Based on the free temperature deformation law for rigid platform,a three-dimensional algorithm has been proposed on the basis of the translational torsion for inclined pile terminals.The calculated displacement of the top of the pile is close to that of the FEM.For all straight pile or nearly symmetrical inclined pile terminal,it can also be simplified as a two-dimensional translation algorithm.The simplified formulas of the internal forces for the vertical pile and the inclined pile are given.The axial force and bending moment of the pile are proportional to its quadratic and quadruplicate pile diameter and the influence of pile diameter on internal force caused by temperature difference is significant.