The active ingredients of natural products are important raw materials in pharmaceutical industry, the ginkgo flavonoids are especially the research focus in the study of Chinese traditional medicine. The separating methods of ginkgo flavonoids appeared many times in documents. It includes two kinds, one is solvent digestion, this method applies to making primary product, the other is deep-processing using colophony, chromatography and enzyme. All these methods have shortcomings, such as low yield and recov...