The utility model relates to a fixing device and a loading flat car. The utility model aims to provide the fixing device which is simple in structure, convenient to use, safe and reliable, and the loading and unloading efficiency is improved, and the transportation cost is reduced. The technical scheme of the utility model is as follows: the nursing bed comprises a bed body, a fixing device is characterized in that the fixing device is provided with a plate, the plate is divided into two sections in the length direction of the plate, one section is a check block section capable of serving as acheck block, the other section is a connecting section, one face of the connecting section is a fixed connecting face, a steel wire rope connecting piece is arranged on the other face of the connecting section, and a through hole matched with a steel wire rope is formed in the steel wire rope connecting piece. The large-diameter steel pipe transportation device is suitable for transporting large-diameter steel pipes by refitting a loading flat car.