From the perspective of usage, white alumina fine powder is not only an abrasive, but also a grinding and polishing material, or a refractory material. Used for grinding high carbon steel, high-speed steel, and various stainless steels. It is also widely used in daily life ceramics such as precision casting, steel refractory materials, chemical refractory materials, electrical ceramics, decorative ceramics, as well as high-tech industries such as military and electronics. According to different preparation processes, the production and preparation processes of rare earth white alumina fine powder can be divided into two categories. The main introduction is the calcination precipitation method using rare earth soluble salts as raw materials.