Supporting bearing load control device and method and automobile

The invention relates to a supporting shaft load control device and method and an automobile. The supporting shaft load control device comprises a controller, the controller is electrically connected with the first two-position five-way electromagnetic valve through a first electromagnetic valve control switch, the controller is in communication connection with a bearing air bag pressure sensor arranged on the bearing air bag, and the controller is in communication connection with a lifting air bag pressure sensor arranged on the lifting air bag; an air source is connected with an air inlet of the air storage cylinder through an overflow valve pipeline; an air outlet pipeline of the air storage cylinder is connected with air inlets of the first two-position five-way electromagnetic valve and the pressure regulating valve; one air outlet pipeline of the first two-position five-way electromagnetic valve is connected with the paired lifting air bags, the other air outlet pipeline of the first two-position five-w