Establishing a three-dimensional geological model of the slope and performing stability analysis through the integration of BIM technology and finite element analysis software. A plug-in with spatial interpolation function is developed using Revit application program interface combined with Kriging interpolation method, and the plug-in is applied to the geological data to realize the refinement modeling of the geological model. The model is imported into HyperMesh through the geometry conversion interface to process the complex geometry and then mesh the 3D mesh, and the mesh is evaluated by quality index, and then imported into Abaqus in inp format to analyze the stability of slopes and calculate the slope instability cloud map. The import of geological models into finite element software enables the integration of BIM technology with finite element techniques. This technological process enhances the accurate representation of geological conditions, with interpolated model surfaces more realistically reflecting actual ground conditions. The integration study not only enables the integration of information from multiple fields such as architectural, structural and geotechnical engineering in a unified model, but also helps improve the accuracy and efficiency of geotechnical analysis.