Based on a series of physical property tests and tri-axial consolidated undrained shear test of remodeling sample of sliding soil under different shear rates for the sliding-zone soil of a landslide in Badong area,this paper ascertains the soil classification of the sliding-zone soil,analyzes the stress-strain relationship about the sample of the sliding-zone soil and does the curve fitting of Duncan-Chang model using the experimental data.According to the analysis and validation,the paper considers that the hyperbolic relationship of Duncan-Chang model can better reflect the gradual hardening type of the type-strain characteristics about the sliding-zone soil of the landslide,and can provide reference for the numerical simulation study on the type of landslide.