Taken siltstone from Niumasi Shuijingtou coal mine, mechanical parameters of the sihstone were obtained by using RMT- 150C rock mechanical machine. Adopting the way of multi -stage loading, the experiment for rock rheology was conducted on RYL - 600 experimental machine, the curve of displacement - time was obtained. It treated the curve of displacement - time into the curve of strain - time, and analyzed the curve of strain - time obtained by experiment. It was found that the siltstone has rheological characteristics of elastic - viscous - viscoelasticity, which was similarity with Burgers model. Parameters of marble rheological model, under different stress level, was obtained . Through the fitting rheological curve for marble, it was concluded that theoretical curve agreed well with that of experiment, which proved that Burgers model could reflect rheological characteristics of marble better%取牛马司水井头煤矿粉砂岩，用RMT～150C微机控制电液伺服岩石力学机测得了粉砂岩的相关力学参数；在RYL-600仪器岩石剪切流变试验仪上采用分级加载方式进行岩石流变试验，得到了位移-时间曲线；处理位移-时间曲线为应变一时间曲线，分析应变-时间曲线，发现该粉砂岩有弹性-粘性-粘弹性的流变特性，这与伯格斯模型性质相似；用MATLAB对试验数据进行伯格斯方程拟合，得出4个应力水平下粉砂岩的流变拟合曲线，发现拟合曲线能较好地反映实验数据，表明伯格斯模型能较好地反映粉砂岩的流变特性；并求出了不同应力水平下粉砂岩流变模型的各项参数．
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