Abstract: In this study, a new kind of structure quantitative parameter based on strain energy is proposed to describe soil structure on the basis of research of related structure quantitative parameters. Undisturbed and remolded loess in Chifeng City of China was investigated by conventional triaxial test under different confining pressures, and stress-strain curves were drawn though the test. The structure parameter based on strain energy was calculated with the comparison of the structure parameter based on stress difference. And then the construction features of Chifeng loess were analyzed to study the applicability of this new structure parameter. The results show that the two kinds of structure parameters both range from 1.5 to 2.0,which is irrelevant to the confining pressures. The new structure parameter based on strain energy is suitable to describe soil structure in actual application.