In this paper, through consulting the literatures of Liliaceae Ornithogalum plants at home and abroad in recent years, the chemical compositions of O.Saundersiae, O.thyr-soides and O.caudatum were systematically summarized.It was found that the Ornithogalum plants mainly contained saponins, flavonoids, triterpenes, alkaloids, polysaccharides, vola-tile oils, and so on.This paper provided a valuable reference for research and development of Ornithogalum plants.