In order to realize the comprehensive research and evaluation for the stability of multilayer heterogeneous complex slope，a new method of active rock composite local strength reduction is proposed.The three-layer slope are analyzed by local strength reduction and global reduction.The results show that stability coefficient is reduced by global reduction method.Because of the variation of non-active rock shear strength parament is small.It can not be used in global strength reduction analysis.The active rock composite are analyzed by local strength reduction method.The results show that after the unloading of the overlying residual slope.The contact zone between the clay mudstone and the weathered basalt are treated by the end anchor.The stability of slope is heightened obviously.The effect of support is obvious.The method is effective for the stability for the stability analysis of the muti-layer complex slope.It can be flexible used in practice.