Bougainvillea glabra ‘Formosa’ is an ornamental which has healthy function.To explore the mechanisms of the secondary-metabolism in Bougainvillea,the volatile components in leaves of Bougainvillea glabra ‘Formosa’ was extracted by steam distillation and were analyzed by GC-MS.In this study,61 chemicals were isolated.After searching NIST database,47 chemical components were identified,which consists of 90 percent of naphtha.The results showed that Bougainvillea glabra ‘Formosa’ had much health-friendly chemical including 2-Hexenal,Phytol,n-Hexadecanoic acid,2-Methoxy-4-vinylphenol,D-Limonene and so on.