滑坡土体的强度参数一直是滑坡稳定性研究的重要指标，地震导致的滑坡土体结构的破坏会降低土体的抗剪强度，土体的含水率、震级的大小、土体本身的结构等都会影响土体的残余强度。本文试验使用英国GDS土动三轴仪对土体先进行扰动，然后饱和土样，测试破坏获得土体的饱和抗剪强度，本文采用正交设计方法研究了土体含水率、振动频率、振幅以及振动周次对土体强度的影响，经过方差分析处理发现这4因素对滑坡土体强度的影响排序为含水率>振幅> 振动周次>振动频率，对滑坡地质灾害防治有较好的参考价值。

 Landslide strength parameter has been an important indicator of the landslide stability research. The destruction of the landslide structure caused by the earthquake reduces the shear strength of the soil, while the soil moisture content, the magnitude of earthquake and soil structure itself also affect the residual strength. The experiment applied in this paper first disturbs the soil, and then saturates the soil samples by adopting the British GDS Soil dynamic triaxial tester to test the saturated soil shear strength after the saturation. This paper employs the orthogonal design method to study the soil moisture content, vibrational frequency, amplitude as well as times of vibration, which together affects on the soil strength, and finally discovers that the four factors affecting the landslide strength according to variance analysis rank as the soil moisture content, amplitude, times of vibration and vibrational frequency. This paper aims to have a valuable reference to the geological hazard control of the landslide.