The invention relates to a loading structural unit for balance examination for an automobile, which comprises a rigid bearing pedestal, a cantilever type loader, a double-acting hydraulic cylinder anda standard sensor. The rigid bearing pedestal is provided with the rotatable cantilever type loader, the double-acting hydraulic cylinder is fixed below the cantilever type loader by adopting an inversion mode, and the standard sensor is connected with the double-acting hydraulic cylinder by also adopting the inversion mode. The loading structural unit effectively achieves selection of loading standard, guarantee of standard levelness, and maintenance during standard loading. The double-acting hydraulic cylinder and the standard sensor are loaded by adopting the inversion mode, so the loadingaccuracy is high; and the standard sensor is loaded by adopting a spherical pressure head, namely a mode of point-surface contact, so as to resist unbalance loading and lateral force, and improve test accuracy. The loading structural unit as a core part in a loading system with high accurate force value achieves functions of bearing, loading, force value transfer and load value test, and plays animportant role in a balance examination device for the automobile.