桃金娘为桃金娘科桃金娘属植物，以根、叶和果入药，具有养血、止血、涩肠、固精之功效。桃金娘的成熟果实富含黄酮苷、酚类；根和树皮含有鞣质、生物碱等；叶的主要成分为桃金娘油，同时富含黄酮苷、水解鞣质。桃金娘具有抗氧化、抗菌、抗病毒、降糖等药理活性，还可治疗呼吸系统、耳鼻喉疾病，在医药、保健品和化妆品行业中具有广泛的应用价值。主要对桃金娘的化学成分、药理作用及临床应用研究进行综述，为桃金娘资源的综合利用和开发研究提供科学依据。

Rhodomyrtus tomentosa is the single-species of Myrtaceae myrtle, its roots, leaves, and fruits have been used in traditional Chinese medicine. It has the functions of blood tonifying, hemostasis, astringing intestine, and securing semen. The fruits of R. tomentosa were reported to contain flavonoids and phenolic compounds, the roots and barks were with tannins and alkaloids, the leaves were with myrtol, flavonoid glycoside, and hydrolyzable tannin. Modern pharmacological studies have demonstrated that R. tomentosa performs anti-oxidant, antibacterial, antivirus, and hypoglycemic activities. R. tomentosa is widely used in the treatment of respiratory and ENT diseases and also has a wide application in medicine, healthy products, and cosmetics. This article mainly summarizes the research progress on chemical constituents, pharmacology and clinical application of R. tomentosa in order to provide a scientific basis for the comprehensive utilization of the resources and development of R. tomentosa.