银杏叶为银杏科植物银杏（GinkgObilobaL）的叶，主产我国、日本及朝鲜半岛，为世界珍贵药用植物资源。我国银杏资源约占世界总量的70％，由于银杏叶提取物在治疗冠心病、脑血栓、脑缺血。脑功能障碍、脑伤后遗症、神经系统疾病和清除氧自由基等方面的疗效确切，目前已成为国内 Ginkgo biloba is the leaf of Ginkgo biloba (GinkgObiloba L.), which is mainly produced in China, Japan and the Korean Peninsula. It is a precious medicinal plant resource in the world. China’s ginkgo resources account for about 70% of the world’s total, due to Ginkgo biloba extract in the treatment of coronary heart disease, cerebral thrombosis, cerebral ischemia. The efficacy of brain dysfunction, sequelae of brain injury, nervous system diseases, and clearance of oxygen free radicals is definitive and has now become a domestic