β－-cyclodextrin as a new medicine anxiliary materical , is mainly used to increase the stability of the medicine, prevent it from oxidation and resoluce, also it can increase the solubility of the medicine, reduce the disadvantage of it and cover the terrible smell from it. On making food , it’s mainly used to get rid of the terrible smell, increase the stability of essence perfume and pigment, the ability of emulsification and preuead the moist, What’s more,it can improve the taste. And it’s mainly used in injection of the food ,as it’s an excellent stabilicer, emulsion used in making medicine, food and cosmetics.