After the buckling instability of a compressed member,it will lose the ability to bear the original designed load,which may lead to serious consequences such as structural collapse.Therefore,it should be avoided as much as possible in the structural design process.Based on the previous design experience of high-pile wharves,due to the limited tonnage of the wharf,the calculated length of the pile foundation is relatively small,and the slenderness ratio is not large.Generally,the buckling stability of the pile foundation can meet the requirements.During the design process,more attention is often paid to the bearing capacity of the pile foundation controlled by the soil layer of the foundation,while the bearing capacity of the pile foundation controlled by the buckling stability is ignored.With the development of large-scale ships in recent years and the increasing tonnage of wharves,compared with previous projects,the length of the pile foundation above the mud surface of high-pile wharves has changed significantly,and buckling stability may become a controlling factor for the bearing capacity of the pile foundation.In response to the above problems,taking phaseⅠcontainer terminal renovation project in Luojing port area of Shanghai Port as an example,the buckling stability of the pile foundation of high-pile wharves is studied,and the force performance and characteristics of pile foundation of different scales are analyzed.The conclusion is drawn that the buckling stability of large-scale pile foundations is less sensitive to changes in pile length and is more suitable for large wharves.The research results can provide a reference for the selection of pile types in wharf structure design.