Abstract:Rheological characteristic is one of the most important mechanical characteristics of rock. It controls the creep deformation. By continuously loading and multi-stage loading,the creep test on Nanyang marble is performed by using the self-developed UCT-1 apparatus of creep test. The creep strength is compared with the instantaneous strength based on the test results,and the ratio of creep strength to instantaneous strength is about 0.9. An empirical formula of creep curve is obtained by data fitting and it approaches to the logarithmic rule. The Burgers theoretical model by Kelvin model and Maxwell model is established by analyzing the features of the curve and its parameters are obtained.