Through long-term compression creep tests on two kinds of rubber waterproof gasket for the shield tunnel of Section A and Section B under the constant pressure, it is found that the relationship between creep deformation of gasket and logarithm of time is almost linear and a predictor formula was put forward. The param- eters in the predictor formula fitted by the first creep test data were used to forecast the second test data and the rationality of the predictor formula was validated. Through the comparison among the prediction formula, Kelvin model, and the three parameters model, it was found that the predictor formula can effectively reflect the com- pression creep behavior of rubber gasket under constant pressure and is the best one to reflect the creep behav- ior among the three models. The research results show that the temperature has less impact on the compression creep behavior of the rubber gasket, which indicates that creep tests can better reflect the durability of the wa- terproof pad than that of stress relaxation tests. Besides, the results may be of practical value for the study and prediction of long-time mechanical behavior and service life of rubber materials.