Abstract：The parameters of rock slope excavation are mostly selected by analogy method of engineering geology at present. However，the selected parameters are chiefly determined by experience of the user and comparability between the newly designed slope and the slopes ranked in reference table，the theory is lack of reliability，and the newly-designed slope is over-safe or under-safe. Therefore，with respect to the rock slope of scattered structure，the slope excavation process is modeled by numerical simulation；and the variation of displacement and stress for various sidestep ratio，height and platform width are compared，the stability and economy of the slope excavation are fully considered；and the optimization parameters of slope excavation are proposed. The research will provide theoretical basis for slope excavation.
