The construction of a 100，000-tons outfitting and large cargo transportation berth in a repair and shipbuilding base in Guangxi Beibu Gulf adopts the conventional wet method of harbor construction,and the project has a large investment,a large amount of underwater reef blasting,a long transportation distance and a great impact on the marine environment.In view of this problem,the dry construction scheme and the hydraulic structure scheme of the ultra-high unloading and equilibrium-weigh retaining wall wharf are proposed according to the wharf layout and topographic and geological conditions.According to the current code and similar structure earth pressure calculation method,a simplified calculation method of earth pressure and structure internal force of ultra-high unloading equilibrium-weigh retaining wall structure is put forward.The stability and the size of the structure section of the retaining wall meet the requirements of the code.At the same time,aiming at the particularity of geology and structure,the detailed structure and construction quality control measures are put forward.