The invention discloses a rail transit system which comprises a rail and a rail vehicle, wherein the rail comprises a steering part and a travelling part, and a sunk part is formed in the travelling part to form an escape channel; and the rail vehicle comprises a vehicle body and multiple bogies, the bogies are movably stridden on the rail, the bogies advance by the travelling part and sheer off by the steering part, the vehicle body is connected to the bogies and driven by the bogies to travel along the rail, the vehicle body comprises multiple carriages which are successively hinged along the length direction of the rail, the multiple carriages constitute at least one vehicle set, the vehicle set comprises the three carriages which are successively hinged, and only the bottoms of the carriages located on two ends of the car set among the three carriages are connected to the bogies respectively. According to the embodiment of the invention, the rail transit system has the advantages of passenger evacuation under emergency situations, low cost, small occupied space, small load bearing of the rail, high stability, flexible steering, low cost, etc.