Ultrafine iron powder is one of the basic raw materials in powder metallurgy industry. Due to its large specific surface area and activity, it has properties such as electricity, magnetism, light, catalysis, adsorption, and chemical reactivity. Therefore, it has a wide range of applications, mainly used in powder metallurgy, manufacturing of mechanical parts, production of friction materials, anti friction materials, hard materials, magnetic materials, lubricants and their products. Secondly, iron powder is widely used in chemical industry, cutting, heating materials, welding rods, etc. In recent years, iron powder has also had broad application prospects in many fields such as electromagnetic, biological, and optical fields.