Evolutionary Polynomial Regression (EPR) is a new method of data mining which attracted much attention in recent years. In this paper, the soil constitutive relation is established by using the data of soil Consolidated Drained (CD) test. The CD test of soft soil from Jiading District of Shanghai City is used to verify the constitutive relationship. The results show that the constitutive relation accurately describes the stress-strain characteristics of soil, and its prediction accuracy is 19.6%~57.7% higher than that of the modified Cambridge ...