Abstract: To research the engineering characteristics of Liaoxi loess deeply, using the conventional strain-control triaxial cell to test the loess soil in highway of Fuxin-Chaoyang in west area of Liaoning by consolidated undrained triaxial tests. The indexes of shear strength of loess by are obtained by fitting method. The results show that there is little variability about the indexes of shear strength of Liaoxi loess and two type relationship of stress-strain, that is the type of strain-hardening and the type of strain-softening. On that basis, the stress-strain relationship model is founded and the paper proposes a suitable empirical model about the strain softening curve.