Abstract: Based on the basic principle of SARMA method,a slope stability analysis method modified SARMA method which could take the influence of atomized rain infiltration into account,was put forward after considering the matrix suction of unsaturated zone and the temporary additional water load.This method and correlative program were applied to the stability evaluation analysis for the high slope of Zipingpu Hydropower Station under the influence of atomized rain Infiltration.It was shown that the atomized rain infiltration and temporary saturation zone were important factors influencing the safety of slope,and the safety factor of slope would greatly decrease due to the atomized rain infiltration.At the same time,reinforcing the seepage control of slope and reducing the infiltration of rain on slope could effectively improve the stability of slope.