Nano alumina has the characteristics of high strength, high hardness, good wear resistance, good heat resistance, and large specific surface area, and is widely used in various fields such as ceramic materials, composite materials, aerospace, environmental protection, catalysts and their carriers. This has also led to the continuous improvement of its research and development technology. At present, scientists have prepared various morphologies of nano alumina materials from one-dimensional to three-dimensional, including spherical, hexagonal sheet, cubic, rod-shaped, fibrous, mesh, flower shaped, curled and other morphologies [2].