The utility model discloses a railway non -standard containers transports flatcar, close the device including chassis and container lock, the chassis is the herringbone and for well roof beam skew symmetry load bearing structure for whole, sets up container lock on the end beam and closes the device for non -stretching rotation type structure, and its fixed connection sets up the container lock who constitutes at big crossbeam and closes the device for flexible rotation type structure on the twistlock of end beam seat is constituteed, and it is assembled in the twistlock seat that big crossbeam is constituteed. The utility model discloses an adopt the chassis be the all steel that the joist support carried in the herringbone and weld skew symmetry load bearing structure, under the prerequisite that does not reduce chassis the stiffness, vehicle body steel structure's dead weight has been reduced, make the vehicle have bigger bearing capacity, improve the transportation benefit of vehicle, the container lock who adopts non -stretching rotation type and flexible rotation type structure simultaneously closes the device and cooperates, the reliability and the security of whole car behind the container loading can improve greatly, and loading and unloading easy operation, can improve handling efficiency by a wide margin.