Ceramic fiber is a fibrous lightweight refractory material with advantages such as light weight, high temperature resistance, good thermal stability, low thermal conductivity, low specific heat and mechanical vibration resistance. Therefore, it has been widely used in machinery, metallurgy, chemical industry, electronics and other industries. In recent years, due to the continuous rise in global energy prices, energy conservation has become a national strategy in China. In this context, ceramic fiber, which saves 10-30% energy compared to traditional refractory materials such as insulation bricks and castables, has been more widely used in the industrial field, and its development prospects are very promising.