To ensure the stability of slopes, different methods have been used, with rock mass excavation being one of the most effective methods. This study aimed to provide a practical and optimal multistage slope design for rock mass excavation. The FLAC3D commercial software was used for numerical simulation, and the multi-verse optimization (MVO) algorithm was applied to design the optimal multistage slope. The resulting design was subsequently implemented in slope engineering. Recorded displacements confirmed that the optimal design is practical and can suitable for engineering applications.