Mineral fiber is a kind of fiber obtained from mineral rock with fibrous structure. Its main components are various oxides, such as silica, alumina, magnesium oxide, etc. its main source is various kinds of asbestos, such as chrysotile, crocidolite, etc. Based on a brief overview of mineral fiber, several common mineral fibers are introduced, such as aluminum silicate fiber, glass fiber, gypsum fiber, carbon fiber and so on. Mineral fiber is widely used in paper industry. Some of its excellent properties can make the paper have the function that the plant fiber does not have.