An education reform on rock triaxial compression experiment was presented because many undergraduates can not well understand the theory of Mohr-Column. In this reform, a whole procedure stress and strain experiment under loading and unloading was carried out. A three-dimensional numerical model was established to simulate the experimental curves. An animation based on numerical analysis was made to vividly show the form and cut-through of shear band in the rock sample. The reform results are of important significances for undergraduates to comprehensively understand the theory of Mohr-Column, enhance the interests to do experiment, improve the understanding of the theory, and develop the knowledge of numerical analysis.