Abstract: Reclamation seawall project is located in the soft ground directly, which Caused the compaction of thefoundation soil, consolidation of drainage and resulting in a larger settlementindex Current calcuIations of the seawall settlement is largely based on the specification datas which mainly uses the sum of layer deposition methods, supplemented by soft soil correction factors. And also combined with comprehensive analysis of the settlement after the consolidation of computing and other similar engineering experience. Different designers tend to have different calculation results. How to determine marine soft soil in the seawall settlement deformation under load accurately is always the major key of the construction and land reclamation projects. In order to investoigate the deformation characteristics of marine soft soil, Basedon the laboratory tests and measured settlement, the author by used Plaxis finite element software to simulate the whole process of the actual projects construction. The author find that usling the elastic-plastic model to simulate plane strain deformation of clay dam settlements, simulation results are close to the measured settlement, and also could simulate the post-construction settlements for future purpose,It also can resolve the large errors resulting bv the exDerienee judgement.