Present invention relates to a rail, crane rail elastic fastening device, which includes the install at the bottom of the rail on both sides of the Snap, layering the elastic interlocking access to pieces of the buckle, elastic pressure pressed by the elastic side rail. Using the present invention allows rail has always been the role of compaction force, solid and reliable rail fastening, not easy to loose, with double locking and damping effect, this practical new also has a simple structure, easy installation and maintenance, anti-reptile and the strong performance features.