In order to solve the problem of long response time of vehicle braking, a cam driven electrohydraulic brake control system was designed, and the braking response time was simulated and verified. The overall structure of the cam electrohydraulic braking system was introduced, and the dynamic model of the system was established. The design variables and constraints for the cam mechanism were defined, and the optimization objective function was constructed. The particle swarm algorithm was optimized to improve the objective function, and the optimization flow chart for the cam mechanism was given. Under different braking pressures, MATLAB software was used to simulate the braking response time of the optimized cam driven electrohydraulic brake, and the simulation results were compared with those before optimization. The results show that before optimization, with the increase of braking pressure, the response time of the cam driven electrohydraulic brake is longer, while after optimization, the response time is shorter. By using the designed cam to drive the electrohydraulic brake control system, the vehicle braking time can be shortened, which is conducive to safe driving.