Objective: To study the chemical constituents of Morinda officinalis.Method: The compounds were isolated and purified by recrystallization and column chromatography with silica gel.Their structures were elucidated on the basis of physicochemical properties and spectral analysis.Result: Nine compounds were identified as β-quebrachol(1)

rubiadin -1- methyl ether(2)rubiadin(3)

2-hydroxy-3-methylanthraquinon(4)

1-hydroxy-2-hydroxymethylanthraquione (5)

2-hydroxy-1-methoxyanthraquione(6)

dimethylhexyl phthalate(7)

3β

19α-dihydroxyl-12-en-28-oic acid(8)

monotropein(9)respectively.Conclusion: Compound 7

8 were isolated from M. officinalis for the first time.