The utility model discloses a carry transportation of out -of - -way formula on back and use novel railway freight car, including tray, on -vehicle hoisting device and the on -vehicle device that revolves, wherein, the tray can stack on board -like railway freight car's chassis for place highway freight train or highway semitrailer that the piggyback was used, on -vehicle hoisting device sets up on the chassis for the drive tray goes up and down for the chassis, on -vehicle rotary device sets up on the chassis for promote the tray for the chassis at horizontal rotation in surface. Compared with the prior art, this kind of novel railway freight car's advantage lies in, can use traditional railway freight car chassis basically, need not to provide the out -of -the -way formula of carrying on the back transportation special chassis. In addition, loading and unloading goods process only need be rotated the light tray of weight and can be accomplished to reduced on -vehicle rotary device dynamic performance requirement, reduced then and carried the manufacturing cost of out -of -the -way formula transportation with railway freight car on the back.