Rail beam and rail transit system

The utility model relates to a track beam and a track traffic system, the track beam comprises a track beam body, a cushion block and a side plate are installed on the two opposite side walls of the track beam body respectively, the cushion block is located between the side plate and the track beam body, and the cushion blocks with different thicknesses are replaced to adjust the spacing distance between the side plate and the track beam body. Thus, the cushion blocks and the side plates are arranged on the two opposite sides of the track beam body, the distance between the side plates and the side walls of the track beam body is changed by changing the thickness of the cushion blocks, then the width of the track beam is changed, the running requirements of track vehicles of different standards are met, meanwhile, the track beam can be shared by the vehicles of different specifications, and the cost is reduced. The universal design of the track beam is realized, and the design cost and the operation cost are