200 m级及其以上的高面板堆石坝的稳定分析是坝体安全的关键指标，而高面板坝的坝坡设计目前仍采用经验坡比，未考虑坝高与坝坡对面板堆石坝稳定性的影响。本文采用基于极限平衡法的STAB稳定分析软件，结合R．阿尔贝提出的堆石体边坡稳定性尺寸效应规律，就坝高和坝坡对高面板坝稳定性的影响进行分析研究，得出坝高和坝坡与稳定系数的关系表达式，为高面板堆石坝坡比的选择和稳定设计提供了简洁的理论方法。

The stability analysis of the above 200m high are the key for its safety, the strength of the construction of high CFRDs hard rock rockfill will generally meet the stability requirements ,but its section are still designed experiencely including the world's highest CFRDS Shuibuya ,without considering the impact of dam height and slope ratio. The Shuibuya as China built the world's highest panel rockfill dam, its operational safety is bound to worthy of our attention. In this paper, Shuibuya project as an example, a formula of stability factor was proposed to indicate the relation between the dam height and its stability, and between the slope ratio and the factor, which was based on the rockfill slope stability size effect law proposed by R. Albert and based on the STAB software with the limit equilibrium method . The results exhibited that the formula was a convenient theoretical way in slope ratio selection and stability design. And use this to verify the relationship between expression stability of the Shuibuya.