The utility model provides a coal mine underground fully mechanized mining gate road power transformation train fast-to-mount and fast-to-dismount type iron sleeper, which belongs to the technical field of railway rails and railway rail accessories. The utility model provides the coal mine underground fully mechanized mining gate road power transformation train fast-to-mount and fast-to-dismount type iron sleeper with the advantages that the operation is easy, and safety and reliability are realized. The iron sleeper provided by the utility model comprises a metal sleeper, wherein base plates are arranged under the left and right ends of the metal sleeper, a left locking mechanism and a right locking mechanism are arranged above the metal sleeper, the left locking mechanism comprises an inner clamp block, a stop block and a rail locking block, the rail locking block is arranged on a hinging support seat through a rail locking block rotating pin shaft, one corner of the rail locking block in the axial direction is in a right-angular surface, the opposite corner is made to be corresponding to the rail bottom shape of an I-shaped iron rail, a corner positioned between the two corners is in an arc surface, the stop block is arranged on the hinging support seat through a stop block rotating pin shaft, an inner concave right-angular surface in lap joint with the right-angular surface of the rail locking block is arranged in the axial direction of the stop block, the hinging support seat is positioned between the inner clamp block and the end part of the metal sleeper, and the inner clamp block and the rail locking block are made to be corresponding to the shape of the rail bottom of the iron rail at the opposite sides.