The invention discloses a light honeycomb wallboard of a ship cabin and a splicing process. The light honeycomb wallboard comprises a center plate. Side plates are fixedly connected to the left and right sides of the center plate, the top and bottom of the center plate are fixedly connected to connecting strips, the sides, close to the connecting strips, of the side plates are fixedly connected tothe connecting strips, a connecting block is fixedly connected to the front side of the center plate, a first connecting port is formed in the left side of the connecting block, and a second connecting port adaptive to the first connecting port is formed in the side, close to the center plate, of each side plate. By matching the connecting strips, a movable groove, a movable block, a movable rod,a fixed plate, a limiting ring, upper and lower springs, a movable groove, a mounting plate, a transverse rod, a through port and left and right springs, the anti-deformation effect of the light honeycomb wallboard of the ship cabin is better, and the light honeycomb wallboard of the ship cabin is prevented from deforming as a result of external factors, so that the attractiveness is ensured, thelight honeycomb wallboard of the ship cabin is prevented from being damaged, and unnecessary economical loss is reduced.