Using different constitutive model to simulate the settlement of the fourth stage of shield excavation respectively，the models used were the anisotropic constitutive model(EVP-SCLAY1 model) and the isotropic models(MC model and MCC model)，then the results with the three models and the measured datas were compared.The results show that the simulation result with the anisotropic model is more consistent with the measured results in simulating the settlement rang and surface settlement of shield excavation，and MC model prediction results are the worst.