Railway vehicle buffer with multi-stage buffer structure

The invention discloses a railway vehicle buffer with a multi-stage buffer structure. The railway vehicle buffer comprises an outer sleeve, a moving rod, a rail and fixing blocks, the fixing blocks are placed at the top of the rail, second mounting blocks are welded to the tops of the fixing blocks, and a supporting rod is placed between the second mounting blocks; second bolts are fixedly mountedoutside the second mounting blocks through threads, the supporting rod and the second mounting blocks are mutually fixed through the second bolts, a first mounting block is arranged at the top of thesupporting rod, and a first bolt is in threaded connection with the first mounting block through a screw; and the first bolt mutually fixes the first mounting block and the supporting rod. The bufferis clamped on the guide rail, then the clamping plate is clamped on the rail, then a rotating handle is rotated, the rotating handle can drive the threaded rod to rotate, the threaded rod can enablethe clamping plate to move,