The properties of rock dynamics under the commercial nuclear reactor foundation are very important Parameters in ascismic design. The properties of rock dynamics and test method under earthquake loading are analyzed in this paper. From this, the dynamic elastic modulus, poisson' ratio, shear modulus, and triaxial pressure strength of 4 kinds of rock (tuff, tuff sandstone, felsophyre, rhyolite porphyry) have been given by using the RDT-10000 high Pressure triaxial machine. These parameters have been used in the feasibility report and the aseismic design of the Sanmen Nuclear Power Plant.