Abstract: To meet the demand of slope stability evaluation，a fully automated 3D reconstruction approach of open-pit slope from images was put forward.Open-pit slope sequence images were first collected with a consumer-grade camera.And then，dense 3D point clouds were generated by integrating structure from motion (SfM) and multi-view stereo (MVS) algorithms.Finally，high-resolution digital surface models of open-pit slope were made by constructing the triangular irregular network and texture mapping.The experiment showed that the overall form and local characteristics of open-pit slope can be accurately expressed through reconstructed model，which can provide powerful support for the correct analysis and evaluation of slope stability.The presented technology has the features of low cost，high efficiency，full automation，and it is especially suitable for dynamic deformation monitoring of the open-pit slope in potential risk.

Key words: Open-pit mine, Slope, Structure from motion, Multi-view stereopsis, 3D reconstruction