合理的滑坡灾害防治工程设计既要考虑滑坡体的稳定性与失稳的危害性，又应考虑防治工程的自身稳定性和安全期限。本文以东大井滑坡为例，依据地面调查、坑槽探及钻探等成果资料，客观地分析和评价滑坡的成因、稳定性与失稳的危害性；并结合三峡工程移民搬迁要求，确定滑坡体及其防治工程的稳定与安全期限，最终制定了合理的防治工程方案。 Reasonable landslide disaster prevention and control engineering design should not only consider the stability of landslide body and instability of the hazard, but also consider the prevention and control of the project itself stability and safety deadlines. This paper takes Dongdajing landslide as an example, objectively analyzes and evaluates the causes, stability and instability of the landslide based on the results of surface survey, pit exploration and drilling. By combining the relocation requirements of the Three Gorges Project, And the prevention and control of the project stability and safety deadlines, and ultimately developed a reasonable program of prevention and control projects.