GB/T 17105-2008 standard classifies dense and shaped aluminum-silicon refractory products. It systematically divides such refractory products according to key indicators such as chemical composition, mineral structure and physical performance of the products. This classification provides convenience for manufacturers to clarify product specifications and for purchasers to screen suitable products. It can help the industry clearly define the characteristics of different aluminum-silicon refractory products, promote product standardization, and help to accurately select suitable refractory materials in high temperature industries such as metallurgy and building materials, improve production efficiency, ensure production safety and stable operation of equipment.