This article discussed the application of shear stress pairing method to evaluation dam base vibration liquefaction of earth - fill dam according to the problem that the sand and gravel layer of main dam base could be liquefied in the condition of seismic intensity grade vll in the design of nierji hydro project 本文结合尼尔基水利枢纽工程设计中主坝坝基砂砾石层( < 5mm含量> 30 =在地震裂度级工况下可能发生液化的问题,探讨了用剪应力对比法在评价土坝坝基震动液化中的应用。