滑坡是土坡重力侵蚀破坏的主要形式 ,在目前的工程实践中 ,土坡稳定性分析最常用的方法是圆弧条分法。但对大量黄土滑坡的观测表明 ,其滑动面并不是圆弧 ,一般是后壁陡直 ,下部接近圆弧 ,总体形状呈“L”形。因此采用经典的圆弧法计算黄土边坡的稳定性是不准确的。根据 Mohr- Coulom b强度理论计算出黄土滑坡后缘拉裂的深度 ,自拉裂底部至坡脚处假定为圆弧滑动面 ,在此前提下搜索最危险滑动面的位置。笔者曾提出了搜索最危险滑动面的一种方法 ,并结合该方法推导出了用圆弧法求解稳定系数的解析式。将黄土边坡具有后缘拉裂这一特点 ,应用于该解析方法中 ,进一步推导出用于黄土滑坡侵蚀稳定性的计算公式 ,通过对泾河南岸一黄土高边坡滑动前地形断面观测和土的物理力学性质指标的测试 ,计算得出其潜在滑动面 ,再与其滑动后实测滑动面比较 ,表明提出的方法比一般的圆弧法有更高的精度 Landslide is the main form of soil erosion and gravitational erosion. In the current engineering practice, the most commonly used method for stability analysis of soil slopes is the arc bar method. However, the observation of a large number of loess landslides shows that the sliding surface is not an arc, generally the back wall is steep and the lower part is close to an arc with an overall shape of “L”. Therefore, it is inaccurate to calculate the stability of loess slope by the classical arc method. According to the theory of Mohr-Coulom b strength, the depth of loess landslide rupture is calculated. From the bottom of the rupture to the foot of the slope, it is assumed to be an arc sliding surface. Under this premise, the location of the most dangerous sliding surface is searched. I have put forward a method of searching for the most dangerous slip surface, and combined with this method, I derive an analytical formula for solving the stability coefficient by arc method. The loess slope with the trailing edge cracking of this feature is applied to the analytical method, and further derived for loess landslide erosion stability of the formula, by the south bank of Jinghe a loess high slope before the cross section observation and Soil physical and mechanical properties of the index test, calculate the potential sliding surface, and then compared with the measured sliding surface after sliding, indicating that the proposed method than the general arc method with higher accuracy