The invention discloses a rail-collecting crane. The rail-collecting crane includes a flatbed truck, a support mechanism, a rail-collecting lifter and a power mechanism; the rail-collecting lifter is fixedly arranged on the support mechanism, the support mechanism is connected with the flatbed truck in a sliding mode, and the power mechanism is arranged on the flatbed truck and provides power for the support mechanism to move relatively to the flatbed truck. The rail-collecting crane can be utilized to recycle multiple steel rails in one time, the rail collecting efficiency is improved, and the transportation cost is reduced.