Abstract: Finite element method (FEM) is an effective method for the slope stability analysis. However, the pre-process of FEM is time-consuming and miscellaneous. Geographic information system (GIS), as a new information technique, has not only powerful functions in data management and spatial analysis, but also has capability of data processing and plotting. In this paper, through an example, the basic principle and a brief work flow of pre-process in FEM are introduced.