李家峡水电站坝前发育有Ⅰ号大型深层岩质滑坡，自１９８３年以来一直处于等速蠕动变形状态，失稳下滑的可能性增强。为确保电站安全运行起见，对Ⅰ号滑坡高程２２００ｍ以上的滑体进行了削方处理，并采用加载反压法的防护措施。为了对处理前后滑体稳定性有一比较确切的了解，采用速推系数法对滑体处于各种库水位变化情况下的稳定性进行了重新评价。 Lijiaxia Hydropower Station has developed a large deep rock massif Ⅰ landslide, since 1983 has been in a state of constant velocity creep deformation, the possibility of instability decline. In order to ensure the safe operation of the power plant, the landslide with the elevation of 2200m above grade Ⅰ landslide was cut off, and the protective measures of load back pressure method were adopted. In order to have a more accurate understanding of the stability of the sliding body before and after the treatment, the stability of the sliding body under various changes of the water level of the reservoir was re-evaluated by the push-push coefficient method.