Both water content and stress influence the deformation of unsaturated soils. Although the formula established by introducing water content to the unsaturated soil calculation model is empirical formula, it is extremely intuitive, and important to develop further. Based on the relation of test parameters of harden curve and water contents, and the relation of secant modulus of harden curve and water content, two approaches where water content is taken account of are established. Experiment is conducted to present the realizing processes of two methods, and the models are also verified. The results show that the results of the two methods both agree with test data very well. and the results of method one are smaller than those of method two.