The invention relates to a high-current conductive rotating joint for power transmission of solar sub-arrays, which is used for mechanical connection and power transmission between solar cell sub-arrays of a space power station. The high-current conductive rotating joint comprises an inner conductive shaft, an outer conductive shaft and a rolling rotation structure arranged between the inner conductive shaft and the outer conductive shaft, the inner conductive shaft and the outer conductive shaft are circular in cross section and mutually inserted in a rotating manner, and the rolling rotationstructure includes a contact elastic piece attached to the inner surface of the outer conductive shaft, an electric contact ring attached to the surface of the inner conductive shaft and a pluralityof conductive rolling pins which are arranged between the electric contact ring and the contact elastic piece and uniformly distributed along the circumferential direction. Compared with the prior art, the high-current conductive rotating joint has the advantages that the conductivity is improved, the rotating friction loss is reduced, the dynamic thermal stability is high, and the electrical lifeis long.