In the application of rubber and plastics, iron oxide red, which does not contain heavy metal ions such as copper and manganese, can be used in aviation tires to prevent rubber aging. Iron oxide pigments have the characteristics of strong coloring power and pure color. They can be used as colorants and fillers for PVC plastic floors and PVC color films, as well as thermosetting plastics for thermoplastic plastics such as calcium carbide powder, bakelite powder and polyolefin. Because the iron oxide pigment is non-toxic, transparent iron oxide pigment is used abroad to color plastic beer bottles, medical vials and food packaging plastics. It is a new type of plastic blending pigment.