Abstract:The leaf essential oil of Cinnamomum septentrionale collected from an artificial planting population in Chengdu city, Sichuan province were analyzed by capillary GC/MS.The results showed that their main chemical constituents were quite different among some trees, and could be divided into four chemotypes, namely 1, 8-cineole, camphor, methyl isoeugenol and 9-oxonerolidol.Except the type of methyl isoeugenol, the other three were first reported. According to the researched results of chemotypes in genus Cinnamomum, multi chemotypes within one species and general characters of chemotypes in different species are universally existed.