A study is conducted on the distribution law of soil pressure behind piles and the calculation of pile bending moment to address the issue of the impact of pile reinforcement on gravity revetments.Using finite element analysis method,the results show that when there is no soil filling between the pile and the revetment,the pile is not subjected to horizontal force within the height range of the wall.The pile foundation bears the local force acting on the pile body at the base of the revetment,caused by soil deformation,which is about 24% of the base friction force.When dredging in front of the wall,local forces on the foundation will disappear.When the cohesion of the soil increases,the local force on the foundation decreases.When the width of the revetment increases,the local force on the foundation decreases.When there is soil filling between the pile and the revetment,the soil pressure can be calculated based on the limited range of soil filling.The research indicates that based on the above distribution law of soil pressure,using Yigong software and finite element software for calculation,considering that dredging in front of the wall does not load local forces on the foundation,but loads a limited range of backfill soil pressure,it is calculated that revetment will reduce the bending moment of the pile body by about 20%.By comparing the results of Yigong and finite element calculations,it is found that the above loading modes and calculation methods can be used for engineering design.