The invention relates to a wheel hub supporting device. The wheel hub supporting device comprises a plurality of cushion blocks, a connecting belt and an induction contactor. As miniature air bags are arranged in the cushion blocks, after a vehicle is subjected to tire bursting, the miniature air bags are rapidly inflated through induction of the induction contactor, and therefore supporting can be rapidly formed; it is guaranteed that a flat tire is kept on a wheel hub, and therefore accidents generated after tire bursting are greatly reduced.