Abstract： Objective To compare the contents of cinnamaldehyde in different parts of fructus cinnamomi,and qualitatively identify its volatile components,to clarify the which parts of fructus cinnamomi accumulating cinnamaldehyde and the composition of volatile components.Methods An Capcell pak C18 column(250 mm×4.6 mm,5 μm)was used,with the mobile phase of methanol-water(45∶55),the flow rate of 1 mL/min;the column temperature of 30℃and the detection wavelength of 290 nm.The samples were analyzed by gas chromatography-mass spectrometry(GC-MS),the samples were qualitatively analyzed by searching the NIST spectral library,and the peak area normalization method was applied for the quantitative analysis of each component.Results The order of cinnamaldehyde content in different places of fructus cinnamomi was as follow:fructus cinnamomi calyx>fructus cinnamomi fruit,which were 51.28 and 2.40 mg/g,respectively.GC-MS was used to identify 30 volatile components in the fructus cinnamomi decoction pieces,26 in the calyx,and 23 in the fruit.There were differences in content and volatile components among the three of them.Conclusion The method is simple and reproducible,and can lay a foundation for the research and resource development and utilization of fructus cinnamomi.