Xanthan gum, which is a kind of extracellular microbial with a wide range of functions produced by Xanthomnas campestris using carbohydrates as the main raw material (such as corn starch) through fermentation engineering. polysaccharides. It has unique rheology, good water solubility, stability to heat, acid and alkali, and good compatibility with various salts. As a thickener, suspending agent, emulsifier, and stabilizer, it can be widely used It is used in more than 20 industries such as food, petroleum, and medicine. It is currently the largest and most widely used microbial polysaccharide in the world.