The high-pile wharfs of the main ports in the coastal areas of China are confronted with significant siltation issues,resulting in extensive damage to pile foundations and high maintenance costs.Based on the fact that the displacement of soft soil on silty bank slope is the main cause of silting in high pile wharf,the long-term monitoring of the displacement characteristics of soft soil on bank slope is carried out by using a combined measurement method involving stress sheets and flexible inclinometer.The study discusses the cumulative displacement of soft soil under loading at the rear of the wharf and examines changes in displacement rates of soft soil before and after dredging cycles.The results show that there will be settlement in the soil layer under the action of overloading,forcing the soil to move in the horizontal direction.It is observed that the lateral displacement of the coast gradually increases towards the seagoing side within one year,and the displacement rate is different before and after the dredging cycles of the wharf.Long-term monitoring of bank displacements is crucial for the management of coastal port project.Accurately analyzing the process can help reduce the risks caused by coastal erosion,landslides,and siltation problems of high-pile wharfs.