The utility model discloses a bridge crane conversion lifting appliance which comprises a lifting bracket and a lifting hook fixed in the center of the lifting bracket; both ends of the lifting bracket are provided with lifting holes; the lifting holes are matched with the lifting hooks of a bridge crane; in an occasion requiring conversion, the two lifting holes of lifting lugs at the left end and the right end of the conversion lifting appliance are hooked with the double hooks of the bridge crane, then the bridge crane is quickly converted into a single-hook lifting appliance and realizes single-hook operation; when double hook operation is required, the double hook state can be resumed by removing the conversion lifting appliance. The bridge crane conversion lifting appliance leads the bridge crane to quickly realize single-hook and double-hook conversion during lifting process, therefore reduces the investment cost of equipment; moreover, the conversion lifting appliance is simple and convenient to be operated, and has small size and low cost; as the hanging point position of a vacuum lifting appliance is fixed and reasonable; the single-hook conversion lifting appliance can be adopted to concentrate the gravity generated by a rail plate and lift, keep the balance of the vacuum lifting appliance and effectively protect the rail plate.