Novel medical use of icaritin and cycloicaritin as well as composition thereof

The invention discloses novel medical use of icaritin and cycloicaritin as well as composition thereof in preparation of a drug of an alpha-glucosidase inhibitor. The composition can be prepared from herba epimedii crude drugs which are matched according to a certain ratio after being respectively extracted to prepare, and also can be obtained in a chemical synthesis manner. The icaritin and the cycloicaritin can be respectively prepared into a hypoglycemic drug in a monomer form, and can be prepared into the hypoglycemic drug in a manner of the composition according to a certain ratio.