To counter the problems of crack or breakage of high-pile wharf joints structures during operation,we take a high-pile wharf in Zhejiang province as the research object and ANSYS as the FEA tool to optimize the size and type of joints structure with displacement constrained and using the genetic algorithm and get the design parameters of a new joint structure.After modeling and applying force loads of ANSYS,we obtain the result which shows that the new joint has a smaller interaction force between the seam teeth and slots,a smaller elastic-plastic deformation and a smaller lateral dislocation displacements,which can ensure the safety of joints effectively.