The utility model relates to a lift by crane the equipment field, provide a guide -car's wheel is changed and is used hoisting accessory, including supporting beam, supporting beam's both ends all are provided with elevation structure, rotationally install in supporting beam elevation structure's upper end, and the lower extreme is provided with adjusts the couple. The utility model discloses, simple structure, it is convenient to make, low in production cost, and light in weight, small, convenient to carry, only need when changing guide -car's wheel at every turn two workmans cooperate work can, practice thrift the cost of labor, improve and change efficiency.