Abstract: The burial depth and stripping ratio of minable seam of Yimin No.3 Open-pit is relatively large. To further reduce the project investment, improve economic efficiency, combined with the actual situation of the project, from the stripping process, mining technology, ground production system layout and other aspects, we optimize development plan of Yimin No.3 open-pit to make the development plan more reasonable, reliable and scientific, which greatly improve implementation of the project.