In practical engineering,rock tensile failures usually occur under impact loads,which is obviously different from its mechanical properties under static loads.Therefore,it is necessary to study the dynamic tensile properties of rock.First,to study the dynamic tensile strength,failure modes and stress waves under high strain rates,the Brazilian disk experiments of granite were performed under different impact velocities by using SHPB system.Meanwhile,LS-DYNA software was used to simulate the dynamic splitting test based on the HJC model,and the results were compared with the laboratory test results at similar impact velocities,which verified the applicability of the HJC model to the dynamic splitting test.The results show that with the increase of impact velocities,the dynamic tensile strength of granite increases gradually and is approximately linearly related to strain rates,and the failure cracks change from I type to Y type.The amplitude of the waveforms increases with the growth of the strain rates,among which the incoming and reflected waveforms tend to be rectangular gradually,and the transmitted waveforms change from "W" type to "V" type.The waveforms and amplitude of numerical simulation are similar to the test results.At lower and higher impact velocities,the difference of dynamic tensile strength is less than 10%,indicating that the HJC model is more suitable for the simulation of the dynamic splitting tensile test of granite in this case.The results can provide a reference for model selections in future finite element analysis of dynamic tensile tests.