The development trend of large-scale container ships poses challenges to the berthing capacity of port terminals,and some existing container terminals need to deepen their harbors to meet the berthing requirements of large container ships.To explore the influence of the dredging depth of the harbor basin on the structural stress of the high-pile wharf,the changes of the mechanical properties of the overall structure after the excavation of the waters in front of the wharf are studied based on the ABAQUS finite element software.By setting different excavation depth conditions in the front waters,the overall deformation of the wharf and the force changes of the pile foundation structure under different load conditions are analyzed.The results show that with the increase of dredging depth:1) The horizontal displacement of the front cushion cap structure reaches a maximum of 2.55 cm,which is larger than that of the rear cushion cap structure,the two parts are gradually brought closer together,the reserved gap is reduced,and there is a possibility of collision between the two cushion caps.2) The displacement of the upper part of the front cushion cap structure is 8 times that of the bottom,and the front cushion cap structure as a whole shows a tendency to dump to the land.3) The dredging depth aggravates the unevenness of the load bearing on each pile from the superstructure,and some piles may be locally damaged due to excessive compression.4) The maximum bending moment of the pile foundation is located near the soil section,and the area with the largest difference in the maximum bending moment of the pile foundation under the condition of each dredging depth is in the middle area of the wharf structure,and the pile in this area may be damaged due to excessive bending.