In order to prevent loss of soil and water,to avoid further damage of the ecological environment,and to expedite the restoration of the ecological system in Baiyekou reservoir project construction area,this study analyzed and predicted the risk and quantity of soil and water loss during construction for the submerged area,hydraulic stucture area and storage area during construction.Resuults show that disturbance from construction was the main reason for soil and water loss,leading to the increase of soil erosion mode.Based on the characteristics of soil and water loss in different function areas,soil and water conservation measures combining engineering and ecological restoration were recommended to stimulate self-repair capability for ecological system and enhance vegetation restoration.Plantation of tree species such as Pinus tabulaeformis,larch,and robinia with alfalfa in between are appropriate approaches for the area.