The composite element method(CEM)

as one kind of the numerical simulation method

has very high efficiency in modeling. It is suitable for the dynamic design of rock slopes

which can realize quick adjustments of structural planes

reinforcement treatments and excavation surfaces in the model. The algorithms for structural planes and reinforcement treatments have been completed in the CEM. However

the simulation of the excavation surfaces and process has not yet been studied. In this study

the excavation model is set up by using the new algorithm and taking the CEM for simulating excavation surfaces for references. Moreover

the relevant program is coded with FORTRAN. Based on an example of rock slop excavation

the simulated results of the new CEM method are compared with the finite element method

and the validity of the proposed excavation simulation method is proved.