The rail clamp is composed of a base, an indenter, an indenter, a bolt (8.8S), a nut (8H) and a retaining nut. The rail pressure plate is a reliable and fixed connection for the crane rail and the ground (or bearing beam), it is arranged along the full length of the track, every 500mm set a group, a group of two pay, symmetrical scenery on the two sides of the track, in the crane operation state, it can be with the vertical and lateral impact, and can withstand the additional side force generated by the crane skew operation.