Abstract: According to the rheological deformation characteristicsof mudstone around an inclined well in Gao Jia Liang mine, this paperproposes a mudstone model with effective support measures for theinclined well. Through mudstone creep loading and unloading tests and based on the model theory of unified rheology, an elastic-viscous-visco elastic-visco elastic-plastic model is established, which can reasonably represent rheological properties of mudstone, and the model parameters are calculated. Through analyzing mudstone mechanical properties obtained by tests and field observation data, and with the bolt-spray-net joint support method, the simulation is carried out by Large-scale finite element software ADINA. It is shown that the support method can effectively control mudstone's deformation, and the bolt-spray-net support method is reasonable and reliable.