Regarding the problems of large depth and undulating terrain in the Majiang operation area of Guangxi，a plan study of the three-level platform and the second-level platform is carried out for the formation of the land area. The three-dimensional BIM excavation and filling method is adopted，and the three-level platform with the least abandonment is selected. Combined with the comprehensive comparative analysis of project construction method，construction investment，operation economy and construction feasibility，a secondary platform plan with slightly more abandonment，but with less investment and shorter construction period is finally selected. The results show that，for the land area with stepped layout，the land area elevation and road longitudinal slope should be comprehensively determined in combination with the access road，wharf platform，and land area depth. For the land formation of the river port project in the mountainous and hilly areas，it is difficult to achieve a complete balance of earth and stone excavation and filling. The plan for the formation of the land area should be as high as possible to reduce the amount of excavation and filling of earth and stone.