Under the condition of indoor artificial rainfall simulation,experiments are carried out regarding rainfall intensity,rainfall duration during different seasons in two soil ditches planted with Caragana korshinskii and Elymus dahuricus and one bare dirt ditch.It is concluded that after planting Caragana korshinskii and Elymus dahuricus,the rainfall runoff yield,runoff duration and runoff transformation rate are in an increasing order,that is: Caragana korshinskiiCaragana korshinskii>Elymus dahuricus.The testing results will be used for analyzing hydrographic effect of herbs and shrubs and evaluating performance of slope protection,besides,the result will be helpful to establish measures to prevent water loss and soil erosion,and superficial layer geological disasters such as landslide,debris flows.