nowadays

the excavating of the slope in a project is always confined by the field and the conscription of the field

resulting in serious troubles of the slope designs. Meanwhile

the parameter of the slope design is often selected on the basis of the experiences or comparability between the newly designed slope and the slopes ranked in reference table

which lacks the theoretic support

therefore the design result is always far from satisfaction. To solve this problem

this paper compares the different changing situations of the slopes’ displacement

stress and plastic zones under distinct width and height of the steps aiming at the the random structural face of the rock slope

with the full consideration of the stability and economic profits of the slopes after the excavation

and thus provides the theoretic support for reasonable project excavation.