The invention discloses a board for an underwater environment. The board comprises a wood body and further comprises a filling layer, a water blocking layer and a metal layer, the water blocking layersurrounds the wood body, the filling layer is arranged between the water blocking layer and the wood body, and the metal layer surrounds the water blocking layer. The filling layer, the water blocking layer and the metal layer are cuboids. The wood body, the filling layer, the water blocking layer and the metal layer are connected through glue. The filling layer, the water blocking layer and themetal layer surround the wood, so that air and water can be effectively isolated, the wood is protected from quick decay when used in the damp or underwater environment, and the service life of the wood itself is prolonged. The wood is wrapped with the filling layer, the water blocking layer and the metal layer, the metal layer is thin and is only 1 cm thick; during use, the weight of the board isgreatly reduced compared with ordinary metal, and the movement and carrying are more convenient and more relaxed.