Optical cable connecting device for train and train

The utility model discloses an optical cable connecting device for a train and the train. The optical cable connecting device includes a first optical cable mounting box (3) and a second optical cable mounting box (4) arranged in a first carriage (1) and a second carriage (2) adjacent to each other and at the ends of the first carriage (1) and the second carriage (2) that are close to each other. The optical cable also includes an optical cable connector provided with a pedestal (7) and a plug (8) connected with each other electrically through plug-fit. The pedestal is arranged on the first optical cable mounting box. An end part of a first optical cable (5) disposed in the first carriage penetrates into the first optical cable mounting box and is connected to the pedestal. An end part of a second optical cable (6) disposed in the second carriage penetrates through the second optical cable mounting box and is connected to the plug. By adopting the optical cable connecting device provided by the utility model, optical cable length loss due to cable button fusion in a marshalling process is avoided.