Abstract:The constituents of essential oils from Magnolia biondii,M.denudata and M.sprengeri were analysed by GC-MS qualitaively and GC quantitatively.Ninety one compounds of M.biondii,seventy one compounds of M.denudata and eighty-eight compounds of M.sprengeri were identified at rates of 97.37%,97.66% and 95.68% respectively.