Taking the third line and the fourth line ship locks of Changzhou hydro-junction for example,this article presents a new navigation wall structure suitable for site conditions limited,namely the composite structure of elevated pile caps and prestressed anchor.This structure improves effectively the condition of the pile foundation internal forces and controls the deformation of the structure through jointing actions of elevated pile caps with the prestressed anchor.When the site conditions are limited,using loads are large and common structures are not appropriate.