根据钻孔资料结合宏观地质调查资料分别作分段线形插值函数、拉格朗日插值函数和样条插值函数 ,用得出的插值函数来表征滑动面。并将插值函数与传统的圆弧滑动面假设分析对比。以南京狮子山东南坡滑坡为例 ,根据不同的插值滑动面 ,采用普遍条分法计算滑坡稳定性系数。最后 ,对不同的结果作了分析对比 ,认为过特征位置采用样条插值函数所表示的滑动面较好地符合实际情况 According to the borehole data and the macroscopic geological survey data, the linear interpolation function, the Lagrange interpolation function and the spline interpolation function are respectively used, and the interpolation function is used to characterize the sliding surface. The interpolation function is compared with the traditional analysis of the assumption of the arc sliding surface. Taking the southeastern slope in Nanjing Lion Rock as an example, the landslide stability coefficient is calculated by the universal bar method according to different interpolation slip surfaces. Finally, the different results are analyzed and compared, that over the characteristic position of the spline interpolation function expressed by the sliding surface better in line with the actual situation