The utility model provides a train seat with adjustable height, the power distribution box comprises a box body, the bottom of box inner wall is provided with the motor, the output fixedly connected with carousel of motor, the top fixedly connected with fixed plate of carousel, the positive top fixedly connected with movable rod of fixed plate, first spout has been seted up to the bottom on box inner wall right side, and the inside sliding connection of first spout has the first pinion rack of left end fixedly connected with of first slide bar, first slide bar. The utility model discloses a cooperation that sets up box, motor, carousel, fixed plate, movable rod, first spout, first slide bar, first pinion rack, movable plate, drive slot, gear, second spout, second slide bar, second pinion rack, bracing piece and seat body is used, has reached the effect of train seat height -adjustable festival, has solved the height that the seat can not be adjusted according to passenger's height to present train seat, and the passenger of not being convenient for uses, has reduced the problem of seat travelling comfort.