Abstract:The horizontal lateral displacement of reinforced concrete or rail anti-slide piles is measured by setting up borehole incline-tube in pile. For reinforced concrete anti-slide piles,it is considered as beams on elastic foundation so as to obtain elastic curve differential equation,and the rotating-angle,bending moment,shear and resistance of soil or rock piles are deduced then. For rail anti-slide piles,the bending moment,normal stress and anti-slide force of rail anti-slide pile are calculated inversely based on flexure deformation measured by inclinometer. Finally,this method is applied to Hanjiaya and 0509 landslide with satisfying effects.