Large-loading multi-point coordinated undercarriage fixed connection structure

The invention relates to a large-loading multi-point coordinated undercarriage fixed connection structure which comprises a main undercarriage fixed connection joint girder, an inside pressure bar, an outside pressure bar and an undercarriage diagonal draw bar joint, and an undercarriage diagonal draw bar adaptor can be selectively arranged according to practical situations. An undercarriage diagonal draw bar is connected to the undercarriage diagonal draw bar joint through the undercarriage diagonal draw bar adaptor, the undercarriage diagonal draw bar joint is connected with an undercarriage bulkhead stiffening girder and an undercarriage intersection frame, and two ends of the inside pressure bar and the outside pressure bar are respectively connected with the main undercarriage fixed connection joint girder and the undercarriage diagonal draw bar adaptor so as to form an integral force transfer system, thereby dispersing the load of the main undercarriage fixed connection joint girder, effectively reducing the load transferred from the undercarriage diagonal draw bar joint to the undercarriage bulkhead stiffening girder and the undercarriage intersection frame, also reducing the load transferred from the main undercarriage fixed connection joint girder to a fuselage, and further effectively solving the problem of large landing load of the undercarriage.