The K-G model is much better than E-μ model for its each parameter directly contacts with soil modulus and convenient for the nonlinear theory and calculation analysis of geotechnical engineering. Taking the Yongdeng unsaturated loess in Western Gansu as the object of study

a large number of unsaturated loess conventional triaxial tests under different humidities is carried out; and then different initial saturations under the K-G model parameters are obtained

the change rule of these parameters with different initial saturations is studied. The relevant expressions of model parameters and initial saturation are established. So that in actual project

using the measured unsaturated loess humidity indicator

we can get the unsaturated loess parameters of K-G model for moistening numerical simulation analysis and avoid suction measurement and calculation. The result has a certain practical value.