In order to ensure the process quality of the hydraulic profile modeling machine tool, the profile modeling tool rest should satisfy definite dynamic characteristic. By means of a systematic design and analysis, the author establishes a mathematical model for the system, and by the use of Matlab/Simulink, it constructs a simulated model for this system, making a simulated analysis of its dynamic characteristics through adopting leaping signals. Factors such as main parameters, piston delivery, damping and roaching loading, which influence the s...