Under the working condition, the bolt is actually in a complicated state under the combined deformation of "tension, bending, torsion and Shear". The numerical simulations and physical tests on the deformation mechanical characteristics of Anchorage System is carried out in this paper. Six different sets of experiments on the combination load of rock bolt have been conducted in laboratory. A series of numerical with ANSYS have been conducted to discuss the distribution of stress on different conditions: tension, bending, shearing and other combined patterns. The distributions of the maximum total displacement, axial displacement, stress and strain energy of the bolt under the combined action of tensile, torsion, bending and bending are analyzed. Then, the length and diameter of the bolt are changed, and its influence on the tensile strength of the bolt is analyzed. Last, the model of the anchor body has been established, and the boundary conditions are changed, the effects of the length of resin, the strength of resin, the strength of surrounding rock and the confining pressure on the strength of the anchorage body have been analyzed, and rules have been obtained. The result from these analyses have been compared with the date from the theoretical analyses.