By gas chromatography–mass spectrometry(GC MS), the water leaching solution of five cinnamomum plants were for medicinal ingredients growing in Sichuan Yibin. The results shows that 76 compounds have been identified High level of phenol, 2, 2' methylenebis[6 (1, 1 dimethylethyl) 4 methyl was detected in all five kinds of cinnamomum plant leaves, indicating that it is characteristics compound of the five cinnamomum plants. Three compounds including 1, 2 Benzenedicarboxylic acid, mono(2 ethylhexyl) ester, 1, 4 Cyclohexadiene, 1 methyl 4 (1 methylethyl) and 1 Octadecene exist in most cinnamomum plants, and these three compounds can also be viewed as the common compounds of the cinnamomum plants. In addition, the remaining 57 kinds of compounds exist in one of the species, indicating that the species have strong specificity. It was found that the Furan, tetrahydro 2, 5 dimethyl , cis , Ethanol, 2, 2' oxybis and Furan, tetrahydro 2, 4 dimethyl , trans exist in three of the species, and the content is relatively high (85.20~94.74%).
