Iron powder can be obtained by press forming and heat treatment process to obtain iron powder-based soft magnetic materials, which are widely used in electrical, power and electronic equipment, such as electromagnet cores, circuit breaker cores, transformer cores, motor stators and rotors. In recent years, the rapid development of PC machines, power supplies and other products has greatly driven the demand for this material. Ultrafine iron powder is one of the basic raw materials of powder metallurgy industry. Due to its large specific surface area and activity, it has special properties such as electricity, magnetism, light, catalysis, adsorption and chemical reactivity. Therefore, it has a wide range of uses, mainly used in powder metallurgy, manufacturing mechanical parts, producing friction materials, anti-friction materials, superhard materials, magnetic materials, lubricants and their products. Secondly, iron powder is widely used in chemical industry, cutting, heating material, welding rod and so on.