Abstract： Object To investigate the chemical constituents in flower buds of Magnolia biondii in order to seek rdference materials for making the quality standard of Flos Magnoliae,and also get further knowledge about its effective components.Methods Compounds were isolated by column chromatography with silica gel.Their structures were identified by spectral analysis (IR,MS,1H-NMR,13C-NMR).Results Four liggnams anda neolignan were obtained and identified. They are veraguensin(Ⅰ),pinoresinol dimethyl ether(Ⅱ),magnolin(Ⅲ),lirioresinol-B dimethyl ether(Ⅳ,)and denudatone(V).Conclusion Compound I and V are found in this plant for the first time.