Full-floating rear axle hub structure and automobile

The full-floating rear axle hub structure comprises a bearing assembly, a rotating assembly and a pipe fork assembly, the bearing assembly comprises an inner ring and a plurality of rolling assemblies arranged around the periphery of the inner ring, and the periphery of the inner ring is concaved inwards in the circumferential direction to form an annular groove; the annular groove comprises two side walls arranged correspondingly and a bottom wall connected with the two side walls, the rotating assembly comprises a driving shaft and a hub assembly connected with the free end of the driving shaft, a through hole is formed in the hub assembly in a penetrating mode, and the hub assembly protrudes outwards from the side wall of the through hole to form an annular flange corresponding to the annular groove; the rolling assembly comprises a first rolling piece and a second rolling piece which abut against the two side walls of the annular groove respectively and abut against the annular flange respectively, the pi