To study the chemical constituents of Cinamomum Camphora leaves,they were extracted isolated and purified by normal-phase and reverse-phase silica gel chromatography and semi-preparative high performance liquid chromatography and their structures were elucidated by spectral analysis.5 compounds included 1 lignans and 4 flavonoid glycosides were obtained.They are(8R,8'R)-3,3',4,4'-tetramethoxy-9-oxo-8-8',9-O-9'-lignans(I),Quercitin-3-O-α-L-rhamnoside(II),Kaempferol-3-Ο-β-D-glucose(6→1)-α-L-rhamnoside(III),rutin(IV),Quercitin 3-Ο-β-D-glucoside(V) respectively.