Abstract: In order to apply the constitutive equations of paddy soil into numerical simulations, viscoelastic parameters of Burgers model was fitted here by Matlab software through analyzing data acquired in creep test of paddy soil. Based on the requirement of ANSYS software, an algorithm was deduced to transform the constitutive equations into Prony series. Based on the actual environment, the suitable FEM was built through the method of test. The data of simulations and experimental test was offered to evaluate the error percentage. As a result, the solution error using Prony series was no more than 1% compared with the experimental data. So, Prony series is simple and efficient．

Key words: paddy soil, creep test, ANSYS, Prony series