A communication network for a rail vehicle, the rail vehicle includes a plurality of carriages, the communication network comprises: a first communication wire, the first communication wire extends through a first area of each carriage; a second communication wire, the second communication wire extends, in parallel with the first communication wire, through a second area of each carriage, and forms a first communication loop with the first communication wire; a third communication wire, the third communication wire extends through a third area of each carriage; and a fourth communication wire, the fourth communication wire extends, in parallel with the third communication wire, through a fourth area of each carriage, and forms a second communication loop with the third communication wire, wherein, the first area and the second area of each carriage are isolated from each other, and the third area and the fourth area of each carriage are isolated from each other, the first area of at least part of the carriages and the second area of at least part of the carriages are respectively provided with a first network component for updating communication data transmitted by the first communication wire and the second communication wire, the third area of at least part of the carriages and the fourth area of at least part of the carriages are respectively provided with a second network component for updating the communication data transmitted by the third communication wire and the fourth communication wire the first network components are sequentially arranged in each carriage in such a way that the first area and the second area are alternated, and the second network components are sequentially arranged in each carriage in such a way that the third area and the fourth area are alternated, the first area and the third area are arranged in an upper area of each carriage and are isolated from each other, and the second area and the fourth area are arranged in a lower area of each carriage and are isolated from each other, the first network component and the second network component in the same carriage are arranged in the upper area and the lower area of the carriage respectively. a first communication wire, the first communication wire extends through a first area of each carriage; a second communication wire, the second communication wire extends, in parallel with the first communication wire, through a second area of each carriage, and forms a first communication loop with the first communication wire; a third communication wire, the third communication wire extends through a third area of each carriage; and a fourth communication wire, the fourth communication wire extends, in parallel with the third communication wire, through a fourth area of each carriage, and forms a second communication loop with the third communication wire, wherein, the first area and the second area of each carriage are isolated from each other, and the third area and the fourth area of each carriage are isolated from each other, the first area of at least part of the carriages and the second area of at least part of the carriages are respectively provided with a first network component for updating communication data transmitted by the first communication wire and the second communication wire, the third area of at least part of the carriages and the fourth area of at least part of the carriages are respectively provided with a second network component for updating the communication data transmitted by the third communication wire and the fourth communication wire the first network components are sequentially arranged in each carriage in such a way that the first area and the second area are alternated, and the second network components are sequentially arranged in each carriage in such a way that the third area and the fourth area are alternated, the first area and the third area are arranged in an upper area of each carriage and are isolated from each other, and the second area and the fourth area are arranged in a lower area of each carriage and are isolated from each other, the first network component and the second network component in the same carriage are arranged in the upper area and the lower area of the carriage respectively.