Aiming at the defects of the micropile that the bending strength is insufficient when strengthening the landslide

this paper introduces prestressed anchor on base of the fork-like micropile composite structure

and puts forward a new micropile-anchor composite anti-sliding structure.In order to verify the reinforcement effect

on the base of the theory of slope stress state

this paper uses software FLAC3 Dto analyze the deformation displacement and stress distribution characteristics of the slpoe in critical sliding state when reinforced by the new micropile-anchor composite structure or not.Comparative results show that:（1）in sliding state

displacement and stress levels of the lower part of slope are greater than those of the upper

judging for the tractive landslide;（2）larger local stress concentration occurs at the arrangement location of the new structure

forming of a structure-soil space frame structure;landslide movement and stress concentration in the middle and lower parts are controlled effectively by the composite system

especially near the slope toe

the principal stress difference and shear strain increment are obviously reduced;（3）prestressed anchorage cable can improve the bearing capacity of the overall structure and decrease the peak of the pile bending moment effectively;（4）the new structure is light

green

and of high flexural bearing capacity

can meet the need of quick treatment against slope disease.