Abstract:Contact FEM strength reduction method is an inverse process in limiting equilibrium analysis of slope stability. Based on the results of reported documents and engineering practice,correlations between nonlinear FEM strength reduction analysis and limiting equilibrium analysis of slope stability are established. The result lays more sufficient foundation for making full use of the advantages of both methods above in the analysis of slope stability;and it guarantees the reliability of calculation of the safety factor and analysis of slope stability. The principles of determining strength parameters of slide mass and glide,density of slide mass,meshing accurately finite element,and determining convergence criteria are established. According to analysis of engineering concrete example,it is testified feasibly in the analysis of slope stability and the calculation of the safety factor. Therefore,it may act as a reference to the analysis and calculation of the similar landslide. The stability of decomposed-rock bedding slope with high nonlinear problem is analyzed by FEM strength reduction of non-separation contact elastoplastic model,which may more clearly reflect actual state of slope deformation and failure.