With the promotion of energy conservation and emission reduction in the international community, the global shipbuilding industry is trying to achieve low fuel consumption, low emissions and low pollution. Among them, the high performance composite materials have been widely used abroad for its excellent properties. The use of aluminum is far lower than the cost of titanium alloy, carbon fiber and other materials. Because of its low density, high strength and good corrosion resistance, it is widely used in modern shipbuilding industry, especially in the construction of high speed ships. In order to achieve lightweight, improve the speed of the ship, often use a low density of aluminum alloy structure.