The English name of cellulose is cellulose, which is a chemical name, specifically referring to the natural macromolecules linked together by glucose units through glycosidic bonds. Cellulose fiber is also called regenerated cellulose, cellulose fiber, of course, is that its chemical composition is cellulose, and its shape conforms to the concept of fiber. The reason for this confusion is that generally cellulose is fibrous, that is, slender. It is easy to call it fiber, but don’t forget that the material included in fiber is not only cellulose, but also when the state of cellulose is different.When it is fibrous, such as degradation, dissolution and regeneration, etc., when its morphology does not meet the definition of fiber, we can't call it cellulose fiber, but only cellulose. Fibers include natural fibers and chemical fibers, and natural fibers include plant fibers and animal fibers, and chemical fibers include man-made fibers and synthetic fibers. Plant fiber is composed of cellulose, hemicellulose and lignin and other small amounts of impurities. The cellulose fibers are natural and regenerated.