The performance of the aircraft braking system directly affects the safety of the aircraft taking off and landing，especially for the aircraft using differential brake to realize the ground direction control, the slow response of the brake system will lead to the failure of rectifying deviation, resulting in the aircraft over running the runway and other accidents.Taking the small and medium sized aircraft braking system as the research object, the composition and working principle of the advanced electrohydraulic braking system were introduced, the electrohydrostatic braking system model was established, and the dynamic simulation study on the full range response and 10% step response of the braking system were carried out.The simulation results show that the brake pressure response meets the design requirements. The simulation results were compared with the experimental data to verify the correctness of the simulation results. The study provides reference for the design of the brake control law.