Objective: In order to analyze the volatile constituents in cultivars Senshan 1 and the other 11 Dendrobium officinale fresh flowers

and identify of aroma chemical composition. The volatile components compared the in different D.officinale flowers

should be used as an indicator to provide a theoretical reference for D.officinale strain evaluation. Method: Extract and analyze the volatile components through head space solid phase micro-extraction (HS-SPME) and GC-MS

and then through SPSS 18.0 software to judge distance kinship using the volatile components in each D.officinale flowers. Result: The main compounds include terpenes

esters

aliphatic

aromatic compounds

various types volatile components appeared differences among 11 families of D.officinale flowers. The cluster analysis results based on close kinship families are relatively close in properties and composition of the volatile components

then the 11 families Dendrobium should divided into three categories according to kinship clustering. Conclusion: The advantage of solid phase micro extraction technology ensure the full content material content and reduce the loss of volatile substances. And at the same time take advantage of the volatile chemical composition and phylogenetic relationships can also provide theoretical reference for D.officinale hybrid breeding and strain evaluation.