Abstract: The geological environment and basic characteristics of landslide in Fangxian was invested by using field geology survey and drilling, the shear strength parameter of soil in slide zone was obtained by using laboratory test, engineering geological analogy and inversion analysis, then the stability of typical cross section of landslide was analyzed. Results showed that under the natural condition, the slope is on creeping state and its stability coefficient is lower safety coefficient, which is lack of stability state; under the heavy rain and seismic conditions, its stability coefficient is lower 1.0, which is on unstable state and should be treated.