Abstract: In order to improve support effect of pre- stressed anchor anti- sliding pile, a numerical simulation method was applied to study the sensitivity and calcul ate anchoring depth of anchor anti- sliding, the inclined angle of anti- sliding pile, anchoring angle, anchoring length and anchoring location factors affected to landslide stability. The sensitivity of each factor were sorted, the descending order of influence degree was anchorage location, pile inclination angle, anchorage angle, anchorag e length, pile anchoring depth. The study results could provide references to the selection on the design parameters of the pre- stressed anchor anti- sliding pile.