As the core component of hydraulic rock drill,the performance parameters of impact mechanism have great influence on drilling efficiency and drilling tool life.In order to obtain more accurate impact performance parameters,the self-designed and manufactured impact hydraulic drilling test-bed was used to carry out impact drilling experiments on granite under different frequencies,and the input parameters of the impact mechanism were collected,processed and analyzed by the Hydrotechnik tester.Then the simulation model of the impact mechanism was established by using AMESim software,and the experimental data were compared with the simulation data.The data are highly consistent,which shows that the simulation model reflects the impact performance parameters of hydraulic rock drill more truly.The model provides reference for the structural improvement of the impact mechanism of hydraulic rock drill and the evaluation of impact performance parameters.