Preparation method of extract containing prodelphinidin and procyanidin of ginkgo

The present invention provides a proanthocyanidin extract from ginkgo, the extract of Proanthocyanidin from 88.7 to 98.5% and total flavonoid content does not exceed 10%, flavonol glycosides contain no more than 5%. The present invention also provides a method for preparing the above extract, comprising the following: using aqueous ethanol extraction, hydrolysis of [beta] -glucosidase, macroporous resin adsorption, polyamide resin adsorption of the extract obtained in step and the like. The present invention provides a ginkgo extract can be used as proanthocyanidins for preventing or treating cardiovascular and cerebrovascular diseases, ophthalmologic disease, antioxidant activity, anti-aging cosmetic for health food, pharmaceutical or cosmetic purposes.