Abstract：With rock wave velocity test in laboratory，borehole wave velocity test in field，layer-inspected wave velocity test of single borehole and cross-borehole wave velocity test for the foundation rockmass of nuclear island of some nuclear power station，the longitudinal and transverse wave velocities of rockmass are attained，and accordingly，the dynamic parameters of rockmass are determined. The difference of test results is contrasted and analyzed，and it is concluded that the test results are influenced by the combined relation between the propagation direction of wave and the strike of main rockmass joint.
