Ginkgo biloba leaves are ginkgo leaves, which are picked in autumn. Ginkgo biloba leaves are sweet, bitter, astringent and flat, belonging to heart meridian and lung meridian. Ginkgo biloba leaves have the functions of astringing lung, relieving asthma, promoting blood circulation, removing blood stasis and relieving pain. Ginkgo biloba leaves can be used for cough and asthma caused by lung deficiency. In addition, Ginkgo biloba leaves have a certain effect on lipid metabolism, so it has an effect on hyperlipidemia. Ginkgo biloba extract is developed in recent years, which can dilate small blood vessels, improve microvessels and improve microcirculation. Therefore, it is widely used in focal cerebral infarction caused by coronary heart disease, angina pectoris and cerebrovascular disease because of its dilating effect, but Ginkgo biloba leaves are prohibited for patients with excess.