Abstract：When the displacement finite element model is applied to numerical calculation in geotechnical engineering，ill-condition problems often occur. This paper comments on these problems such as extreme anisotropy，incompressible or nearly incompressible material as well as shear locking in plate，etc. and researches the characteristics and applicable situation of many methods to conquer ill-condition problems such as regularization，standardization and splitting elastic modules finite elements. By the example of calculating plane bar-system problems with finite element method，the advantages and disadvantages of regularization，standardization and splitting elastic modulus finite element method are analyzed and compared.
