Door with Chinese Fir Laminated group box, needs to be thick sanding after pressed 3 L "nn.1 thick fiber board, and thick sanding after hot pressing cover stick thin Mushan the original process in the presence of uneven substrate, leading to stick thin wood plate surface ripples are generated. The door core plate by end milling around, making the door more stereo. The pressure fixed lines in the door core board, make the door core plate is provided with a replaceable thick, improve the door core plate produced by the original process problems, the need to change the door leaf.