The flowers and leaves of Michelia champaca Linn. have got a strong nice scent. In order to find out their value for exploitation and utilization, the constituents of volatile oils extracted with SDE from the leaves, flowers and fruits of Michelia champaca Linn. collected in June were analyzed by techniques of GC-MS-computer. Seventeen, thirty-five and thirty-eight compounds were identified from the above three organs with SDE, respectively. The identified relative contents of the three kinds of essential oils are 92.18%, 99.23% and 98.93%, respectively. There are some differences among the chemical constituents of the three kinds of essential oils. The main constituents are beta-Linalool, germacrene B, caryophyllene, eucalyptol, β-elemene etc. The volatile oils from Michelia champaca Linn. are abundant in the high bioactive compounds with very important uses for perfume and medicine industry．