The change of the anchor location of single sheet-pile structure has a great influence on its structure system performance,however this problem is insufficiently considered in the current design and research.This paper consists of two parts.The first part is concerned with the design of the single sheet pile structure system using the free earth support method.On basis of the structure system design obtained in the first part,the second part applies the finite element method to investigate the effect of the anchor location on the wall bending moments,anchor forces and structure displacements where the sheet pile and the soil deformation characteristics are taken into account.The results show that,at the anchor point between the 0.25 and 0.3 times of the dredging depth,the maximum wall horizontal deformations and the ground settlements behind the wall reach the minimum value and as the anchor point moves down from the top of the pile,the anchor force increases and the maximum wall bending moment decreases.Furthermore,compared to one of FEM,the single sheet pile structure system of the free earth support method has the overestimating wall bending moments which are conducive to the safety of the wall pile and the underestimating anchor forces which lead to the failure of the anchor.