Flos Chrysanthemi Indici volatile oil was extracted by steam distillation method. GC-MS was employed to detect the essential oil of the tested sample,meanwhile the method of heuristic evolving latent projection（ HELP）was also used to resolve the overlapping peaks,while the components were analyzed by similarity searching in them as spectra library（ NIST107 ）and quantitatively by overall volume integra-tion（OVA）,66 kinds of compounds were identified,accounting for 75. 32% of the total content. The ma-jor constituents of the sample studied ...
