After the construction of high-piled wharf，due to the influence of the pile foundation of the hydraulic structure，the hydrodynamic conditions have changed，and the sediment deposition of the lower part of the wharf surface in some areas is serious. To ensure the safety of the wharf structure，the bottom and rear of the wharf need to be maintained by dredging regularly in the later stage，which is difficult to maintain and expensive. To optimize the initial investment and later maintenance cost of the project，taking into account the interaction between the pile and the soil is considered，and the 3D solid finite element analysis method is used to analyze the impact of sedimentation around the wharf foundation piles based on an engineering example. The optimization calculation and cost analysis are carried out for different structural schemes based on the analysis results and structural force characteristics.The analysis shows that the initial investment and maintenance cost of the project are optimal when steel pipe piles are used for the shoreward raking piles with large pile top bending moment and concrete large pipe pile combination piles are used for the rest of the foundation piles.