Abstract: Rainfall infiltration and groundwater have great impacts on the slope stability. Traditional slope drainage facilities are greatly affected by the geological conditions and are difficult to meet the drainage requirements of the giant landslide. In view of the complicated geological conditions and insufficient drainage capacity of giant slopes, a new integrated structure was put forward. With the fluid-solid interaction theory module in FLAC3D, we compare the slide and structural stress, displacement, anchor force and drainage quantity of traditional landslide retaining structure (anti-slide pile and drainage tunnel) and new structure, the anchored plate-pile retaining wall with cut-off diversion. The calculation results show that the new structure exhibited better performances than traditional structures on long duration drainage in the view of the maximum shear stress of slope, the maximum stress of the structures, the maximum displacement, and maximum axial force of the anchor rope, which show the superiority of the new structure. The new structure is conducive to the internal drainage of the slope and the stability of slopes.