Abstract: Nonlinear science provides a completely new theory for the slope stability analysis.The chaotic neural network model based on the chaotic neural network theory is applied to evaluate and forecast the slope stability by collecting lots of the slope stability or damage cases.The application of this method to the slope stability of a certain open-pit indicated that the forecast result by the chaotic neural network is the same as that by the traditional limit equilibrium calculations.The method is also used for the sensitive analysis of the influent factors of the slope stability.The results show the sensitivity for the slope stability is decreasing in turn from the internal friction angle，cohesive force，slope angle to slope height.

Key words: Nonlinear science, Chaotic neural network method, Sensitive analysis, Safety factor