The invention provides the preparation method of compound quinatic acid and the application in preparing glycosidase inhibitor.The present invention extracts separated potent a-glucosidase inhibitor from Three Akebia Decne Species vegetable material source is abundant extract preparation method easy operating and also can make plant itself be utilized for a long time without destruction when adopting fruit to extract can increase economic efficiency environmentally friendly again and this monomeric compound is stable easy to store.Pharmacological evaluation demonstration the a-Glucosidase inhibitor specific activity one line diabetes medicament acarbose of compound quinatic acid is stronger is expected to be further development of the medicine of prevention and clinical treatment type Ⅱdiabetes mellitus has applications well DEVELOPMENT PROSPECT.

暂无附图