There are obvious vibration and noise when the conventional ABS hydraulic system is working. The vibration mechanism of ABS hydraulic system was analyzed and studied. It was proposed using the servo valve instead of ordinary reversing valve, and the ABS controller based on pressure feedback of PID combined with threshold was established by MATLAB/Simulink, so the continuously adjusted and controlled flow of ABS hydraulic system were implemented. AMESim model of the ABS system was established to achieve co-simulation by the data interface embedded in the ABS controller. The pressure shocks, piston displacement, velocity and acceleration curves of characteristics of the conventional with improved ABS systems were analyzed in comparison. The experiment shows that the pressure fluctuation is inhibited effectively in the improved ABS hydraulic system, and the impulse-resistant performance is increased obviously.