Objective: To study the chemical constituents of organic acid in the stems and leaves of Alpinia oxyphylla. Method: The stems and leaves of A. oxyphylla were extracted with 95% ethanol and then extracted by petroleum ether

chloroform

ethyl acetate

and n-butyl alcohol respectively

the chemical constituents were isolated by using various column chromatorgaphies from petroleum ether and chloroform parts

and their structures were elucidated on basis of physicochemical constants and spectral data analysis. Result: Ten organic acid compounds were obtained and determined to be p-hydroxycinnamic acid (1)

vanillic acid (2)

protocatechuic acid (3)

p-hydroxybenzoic acid (4)

myristic acid (5)

palmitic acid (6)

(-sitosterol palmitate (7)

arachidic acid (8)

docosanoic acid (9)

octacosanoic acid (10). Conclusion: Compounds 1-10 were obtained from the parts of stems and leaves of A. oxyphylla for the first time.