Methyl beta cyclodextrin is an alkylated derivative of beta cyclodextrin. The hydrogens on the C2, C3 and C6 hydroxyl groups of beta cyclodextrin can be replaced by methyl groups. Since methyl beta cyclodextrin is not only water soluble but also soluble in organic solvents, it has a strong ability to include drugs, so it is a relatively important product, and the pharmaceutical preparation industry pays great attention to it. TThe products currently on the market are 2-O-methylated-β-cyclodextrin, 2,6-O-dimethyl-β-cyclodextrin, 2, 3, 6-O-trimethyl- 4 types of β-cyclodextrin or fully methylated-β-cyclodextrin and randomly methylated-β-cyclodextrin or partially methylated-β-cyclodextrin. Methyl beta-cyclodextrin has good solubilization and inclusion effects, is easily soluble in water and soluble in organic solvents, so it is widely used in the dyeing and finishing of medicines, pesticides, food, cosmetics, daily chemical products, textiles, and chemistry. Industry, chromatographic materials or other materials science.