Front axle composite air suspension system matched with straight thrust rod

The invention relates to a front axle composite air suspension system matched with a straight thrust rod, and belongs to the technical field of commercial vehicle front axle suspensions. The front axle composite air suspension system comprises a frame assembly which comprises frame longitudinal beams which are parallel to each other and arranged at intervals; a front axle assembly; a steel plate spring which is longitudinally fixed on the front axle assembly so as to elastically support the frame longitudinal beam; a vibration reduction air bag which is fixedly positioned between the front axle assembly and the frame longitudinal beam so as to elastically support the frame longitudinal beam; and a longitudinal inclination prevention assembly which comprises an air bag installation support fixed to the front axle assembly and a fixing support located on the front side of the front axle assembly and perpendicularly connected with the bottom of the longitudinal beam of the frame, wherein a longitudinal straight