Abstract: Six chemical constituents were isolated from the extract of Erythrodontium julaceum by silica gel column chromatography,reverse silica gel column chromatography,Sephadex LH20 column chromatography and MPLC.These compounds were identified as loliolide (1),diaaurantimide benzoate (2),olean13(18)ene (3),stigmast4ene3one (4),βsitosterol (5),and phydroxybenzaldehyde (6) on the basis of the spectral analysis and chemical evidence．All the compounds were isolated from the genus Erythrodontium for the first time.

Key words: bryophytes, Erythrodontium julaceum, chemical constituents, structural identification