Loading device and loading method for slewing support lug of tail beam of equipment vehicle

The invention relates to a loading device for a slewing support lug of a tail beam of an equipment vehicle, the loading device comprises a longitudinal beam, a cross beam, a support lug, an erecting electric cylinder, a pressure sensor, a vertical loading component, an inclinometer, a leveling support leg and the like, the longitudinal beam is hinged with the support lug on the tail beam through a pin shaft, the erecting cylinder is hinged with an erecting lower support and the longitudinal beam through two pin shafts, and the pressure sensor is arranged on the vertical loading component. The cross beams are connected with the longitudinal beams through bolts; the cross beam and the vertical loading assembly can be adjusted in position according to different vehicle types, loads and various working states so as to adapt to various vehicle type, multi-state and multi-angle loading tests. The device is simple in structural form, and can quickly and accurately load the support lug welding structure and evaluate