In the brake control system of large aircraft, it is usually for multiple sets of brake pressure servo valve cylinder systems to work in parallel, and the oil return flow in the system surges after parallel connection, and the coupling effect and structural differences between each brake pressure servo valve cylinder system will have extremely complex vibration characteristics of multi-valve parallel brake systems. Therefore, the detailed analysis of the parallel connection of multiple valves is carried out to provide guidance for the study of reasonable and effective system vibration suppression methods. Considering that the hydraulic pipeline is also a key component in the multi-valve parallel brake system, if the hydraulic pipeline resonates under the fluid excitation of the brake pressure servo valve, it will further aggravate the vibration of the entire system, and it is necessary to carry out modal analysis for the hydraulic pipeline in the system. In this paper, the basic equation of fluid–structure interaction of hydraulic pipeline system is established by modal analysis of the hydraulic pipeline of multi-valve parallel brake system, the modal solution of hydraulic pipeline based on MATLAB programming, the dynamic model of multi-valve parallel braking system is established based on MATLAB/Simulink, and the influence of the number of parallel valves, the structural differences of each brake pressure servo valve control cylinder system, and the influence of supply/return pressure changes on the output of multi-valve parallel brake system in the system are analyzed.