Abstract：The nature and property of jointed rocks are very complicated for the various geological actions and a lot of cracks. It is very difficult and costly to carry out physical model test to study the mechanical properties of jointed rocks in depth. Therefore，numerical model test with natural advantage is applied to the research on jointed rocks，but the veracity may be doubted. A new method has been proposed，which considers physical and numerical model tests. The method can take advantage of the two kinds of experiments，facility of physical model test and low cost of numerical test. Based on this idea，a numerical model has been set up，and then its facilities have been validated by the results form special and typical physical model tests. Finally，the numerical model is used to carry out tests on jointed rock samples to study the mechanical properties of jointed rocks. In addition，it has been verified by numerical model test；and the influences of the friction coefficient on crack insides and confining pressure on the first principal stress，deformation，and failure model of jointed rock mass sample，are also discussed.
