Gypsum block is a kind of lump light wall material taking the construction gypsum (the calcined nature or byproduct gypsum) as the main raw material together with some water, then going through the processes of forming and drying. It has the advantages of light weight, tidy shape, smooth face, fire resistance, heat insulation, sound proof, high strength, aging resistance, and it is easy to operate(mill, nail or sawn); It can also adjust the indoor humidity. Thus it is widely used in the industrial and civil buildings as the interior wall material or decorating material, especially in the high-rise buildings.