Abstract: A large number of settlement observation data are analyzed and the laws of the development of settlement-time curve measured are studied.The settlement-time curve show the occurrence,development,stability,and then the limit of a certain form and that the form accords with the basic form of the growth curve.The entire process of settlement prediction model is established and the meaning of the parameters is analyzed.The influence of various parameters at different settlement stages and the application scope and its guiding significance in practice are analyzed.The evaluation of the model is ideal and the predicted results of several project examples show that the present model is scientific and applicable.