The two sides of the honeycomb aluminum plate are high-strength aluminum plates, and the inner layer is specially made hexagonal aluminum honeycombs. As the core plate adhered to the sandwich structure, it bears pressure tangentially. These dense honeycombs that are restrained are like many small I-beams, which can disperse the pressure from the panel direction, making the plate subject to uniform stress, ensuring that the panel can still maintain a high flatness when it is larger.