The utility model relates to the technical field of power supply, and discloses a rotary power supply device, which comprises a fixed seat, the top of the fixed seat is provided with a circle of sliding groove and a circle of conductive groove, the bottom of the fixed seat is provided with a connecting plug, and the connecting plug is electrically connected with the conductive groove; the rotating seat is located above the fixed seat and rotationally connected with the fixed seat, a sliding ring and a conductive ring are arranged at the bottom of the rotating seat, the sliding ring is matched with the sliding groove, and the conductive ring is matched with the conductive groove; a circular empty groove is formed in the rotating seat, a plurality of transmission lines are arranged in the circular empty groove, one end of each
transmission line is connected with the conductive ring, and the other end of each
transmission line is connected with a connecting block located on the inner wall of the circular empty groove. According to the device, the fixed seat and the rotating seat can still transmit current to supply power to
electrical equipment after being rotated; in addition, by arranging a plurality of transmission lines connected in parallel, the total amount of current is increased, and the device can transmit more current.