Manual sliding door device of railway vehicle

The utility model relates to a manual sliding door device of a railway vehicle, which can obtain simultaneous opening or closing of a left door leaf and a right door leaf and can obtain stop of the left door leaf and the right door leaf at any position on the premise that a corresponding sliding door box structure is not installed. The manual sliding door device also improves flexibility of symmetrical operation of the left door leaf and the right door leaf and reduces noise caused by opening and closing of the door leaves. The manual sliding door device comprises the left door leaf and the right door leaf arranged between vehicle body sandwich layers on two sides and a door sill. A group of symmetrical bearing mechanisms with sliding tracks are arranged at the bottom of the left door leaf and the bottom of the right door leaf respectively. The left door leaf and the right door leaf are connected onto fixed supports of the bearing mechanisms respectively. A synchronizer which is connected with a steel wire ro