The flow field characteristics and performance parameters of the prototype of a SC-86H liquid-jet hammer with high blow energy were calculated using CFD dynamic analysis. The blow frequency of the liquid-jet hammer was measured using specially designed testing equipment. In addition, the simulated results of the blow frequency of the liquid-jet hammer were compared with those measured results. If the fluid resistance on the external surface of the hammer was ignored, then the simulated results of the blow frequency were larger than the measured results, with a minimum relative error between them of 18.9%. If the fluid resistance at the hammer was taken into account, then the simulated results agreed with the measured results and showed a maximum relative error of 8.0%, which indicated great improvement of the simulation methods that has great agreement with experimental measurement. Therefore, taking measures to eliminate the axial fluid resistance caused by hammer movement will increase the liquid-jet hammer′s blow energy and energy efficiency.