Iron oxide pigment is a type of pigment with good dispersibility, excellent light resistance, and weather resistance. Iron oxide pigments mainly refer to four types of coloring pigments: iron oxide red, iron yellow, iron black, and iron brown, with iron oxide as the basic substance. Among them, iron oxide red is the main pigment (accounting for about 50% of iron oxide pigments), and mica iron oxide used as anti rust pigment and magnetic iron oxide used as magnetic recording material also belong to the category of iron oxide pigments. Iron oxide is the second largest inorganic pigment after titanium dioxide and also the largest colored inorganic pigment. More than 70% of all consumed iron oxide pigments are prepared by chemical synthesis methods, known as synthetic iron oxide. Synthetic iron oxide is widely used in building materials, coatings, plastics, electronics, tobacco, medicine, rubber, ceramics, inks, magnetic materials, papermaking, and other fields due to its high synthesis purity, uniform particle size, wide chromatography, multiple colors, low cost, and non-toxic properties, as well as excellent coloring and application properties, as well as UV absorption properties.