Abstract: Traditional calculation methods specified in the current code for the sheet-pile wall are all limited and the interaction between soil and pile can not be taken into account， therefore non-linear FEM analysis for the interal force of the sheet-pile wall based on Plaxis software is carried out herein, of which results are compared with those of the traditional vertical beam on elastic foundation method. The research results show： (1)the assumption for the active earth pressure behind the sheet-pile wall in current Chinese Code differs from the results by Plaxis； (2)hardening soil constitutive model can represent the non-linear properties of soilmass well; (3)among all soilmass parameters for hardening soil model， the internal friction angle is the most sensitive， the cohesion force and modulus of compressibility less and parameter M is the least.