Taking high frequency hammer as research object, firstly, a mathematical model was established by the analysis of the structure and operational principle of high frequency hammer. Secondly, the influential rules of the hydraulic pressure motor’s output speed on the impact frequency and velocity were obtained by using MATLAB to solve it and using AMESim software to model and simulate the vibration system of high frequency hammer. Finally, modeling and simulating high frequency hammer were achieved by ADAMS, which displayed that the working condition of simulation model accorded with the running situation on AMESim software and the real running situation of high frequency hammer. So the correctness of the mathematical model is verified.It provides new bases and methods for the research on high frequency hammer’s design.