Based on the working principle of PE400*600 compound pendulum jaw crusher machine, the size of its parts was settled by parameters calculation. Crank-rocker mechanism replaces the original working one, simulated optimization design software ADAMS was used to conduct parametric modeling and simulating optimization. The machine position was moved by the change of parameterized points to achieve optimized design, one parameter was settled to maximize the crushing cavity change, with the settlement of position and size of machine.