Main landing gear brake control hydraulic system of civil wide-body aircraft

The utility model discloses a civil wide-body aircraft main landing gear brake control hydraulic system which comprises a brake control valve group, the brake control valve group comprises a brake pressure control system and a working state change-over switch, the brake pressure control system comprises a proportional pressure reducing valve, and the working state change-over switch comprises a two-position four-way electromagnetic directional valve. The proportional pressure reducing valve is communicated with the brake actuating cylinder through the two-position four-way electromagnetic directional valve, the two-position four-way electromagnetic directional valve controls connection and disconnection of an oil way between the proportional pressure reducing valve and the brake actuating cylinder, and return oil of the two-position four-way electromagnetic directional valve and return oil of the proportional pressure reducing valve are both communicated with the T port. According to the utility model, the fu