The utility model discloses a boosting counter-force support for a swiveling bridge to swivel, which comprises a plurality of counter-force supports and a boosting device, wherein the counter-force supports are evenly distributed on a swiveling substrate; the boosting device is matched with a haulage cable in the swiveling process to carry out assistant swiveling to a swiveled bridge; the counter-force supports are evenly distributed on a peripheral line by taking a swiveling axis as the center along the peripheral direction; the bottom of the swiveled bridge is provided with a plurality of supporting legs; the swiveled bridge is stably put on a swiveling slideway on the swiveling substrate by the supporting legs; the arrangement positions of the supporting legs respectively correspond to the arrangement positions of the counter-force supports; the boosting device is installed between one counter-force support and one supporting leg adjacent to the counter-force support; and the boosting direction of the boosting device is consistent to the bridge swiveling direction. The boosting counter-force support has the advantages of simple structure, reasonable design and good use effect, and is convenient to realize and simple to operate; and under the condition that the force of the haulage cable reaches a designed value but the swiveling bridge still can not normally rotate, the assistant swiveling force is provided for the bridge to swivel to ensure that the bridge can normally swivel.