当进行滑坡地震稳定性分析时，一般对滑体取某一固定的加速度，这忽略了地震波的传播过程。滑坡在地震中破坏的根本原因是地震波在岩土体中传播时，在滑体和滑床间形成了加速度差。推导了加速度差的计算公式，以青海省玉树机场路3号滑坡为原型，以玉树机场强震观测台的实测加速度时程为动力输入，采用传递系数法计算滑坡动力稳定系数时程曲线。结果表明，天然状态滑坡的稳定系数为1.269，最小动力稳定性系数为0.962，最小平均稳定系数为1.069。滑坡的整体稳定性较好，不会形成整体失稳，但会有局部变形，与震后实测现象一致。

In general, a certain value of acceleration is applied to the sliding mass when analyzing the seismic stability of landslides，which ignores the propagation of seismic wave during the process. However, the failure of a landslide in an earthquake is fundamentally caused by the occurrence of the acceleration difference between the sliding body and the sliding bed when seismic waves propagate in rock and soil. In this study, a formula was deduced to calculate the acceleration difference. Taken the Yushu airport road landslide III in Qinghai province as an example, the dynamic input was referred to the time history curve of acceleration recorded at the airport seismological observatory in Yushu earthquake. Meanwhile, the time history curve of the dynamic stability coefficient of the landslide was obtained by using the transfer coefficient method. The calculated results show that the stability coefficient of the landslide in natural state is 1.269, the minimum dynamic stability coefficient is 0.962, and the minimum average stability coefficient is 1.069. The above results indicate that the overall stability of landslide is good. Although the entire failure of landslide would not occur in an earthquake, some local deformation happens. It is also verified that the calculated results are consistent with the observed phenomenon after the earthquake.