MC presents physiological inertness, widely used as thickeners, protective colloids, auxiliary emulsifiers, pigments, binders and film-forming agents for tablets in pharmaceuticals, food and cosmetics, and can also be used as a matrix for suspension or viscous eye drops, as well as being used as stabilizers for drugs, as the main raw material for internal laxatives, gargles, and cornea-contact eyewear wetting liquids, and as a backbone material for the preparation of hydrophilic gels backbone sustained-release preparations with MC, microporous membranes or multilayer coated membranes sustained-release preparations. Microporous membrane or multilayer coating membrane slow-release preparations.