Abstract: The object of study in this paper is the northmost part of strip slope in Anjialing mine, and the stability analyses and the destruction evolution mechanism for the landslide destruction of typical side slope has been studied according to the actual situation and demand.what's more, this article has also introduced the corresponding plan for government and carried stability computation and the numerical simulation analysis of side slope which has been processed according to result of stability computation and principle of simulated destruction not only after the slope destroyed but also before. It is easy to learn from the result of computation analysis after this slope has been processed that the stable safety meets the requirements, the side slope destruction field is under controlled, the displacement is stable basically and the whole stability can satisfy the varied requirements both on life and production.