Supporting structure of aircraft cabin door mechanism

The utility model belongs to the field of aircraft structure design, and relates to an aircraft cabin door mechanism supporting structure which comprises a bottom plate, a vertical edge, an inclined strut and a lug piece which are integrally arranged. The bottom plate is in bolted connection with an upper edge strip of a cabin door cross beam through four bolt holes, and the lugs are in bolted connection with a cabin door mechanism through mounting holes; when the interior of the aircraft cabin is pressurized, pressurized load is transmitted to the supporting structure through the door frame and the cabin door, the bottom plate and the lugs can be stably supported through the inclined struts and the vertical edges, meanwhile, the load between the bottom plate and the lugs is dispersed through the inclined struts and the vertical edges, and it is guaranteed that the cabin door cannot be pushed open due to huge pressure difference. The bottom plate, the vertical edges, the inclined struts and the lugs are integ