Abstract: Because the geometry of a cut-off wall generally is a thin long-strip,there eaists a problem of deficiency of larger length-width radio enploying conventional FEM calculation. By examples, this paper introduces the element-free method coupled with FEM, which can give satisfactory results for calculation of some thin stractures, such as cut-off wall in embankment. With simply adding nodes freely. As it can avoid the deficiency from too large length to width ratio mesh in traditional FEM, the simulating accuracy can be enhanced.