The utility model discloses a spar straightening device with multiple rotating hubs rotating positively and reversely, which comprises a power source, a transmission device, at least two rotating hubs and a plurality of sets of opposed straightening rollers arranged on the hubs. The spar straightening device adopts a plurality of rotating hubs which rotate positively and reversely; all the straightening rollers are driven rollers; two adjacent rotating rollers are ensured to rotate in opposite directions, so the torsion acted on the spar to be straightened by all the rotating rollers can be balanced out, and the spar to be straightened can not rotate during the straightening process, thus avoiding bump and scrape of the spar to be straightened, preventing the spar from being pressed flat by the pinch rolls, and ensuring the straightening quality. Meanwhile, three sets of adjusting screw mandrels are adopted to respectively adjust the vertical displacements, the axial displacements and the swing angles of the straightening rollers in the rotating hubs, thereby further ensuring that the spar straightening device is applicable both for spars with different diameters and for the requirements of different feeding speeds.