Abstract: The chemical constituents of Xinyi essential oils of Y.×Elizabeth (E.Sperber) D.L.Fu growing in different areas were analysed by GC/MS.There were 26 constituents were identified in both oils,and most of them could be used for medicine and spice,so this kind of Xinyi has application value.Each Xinyi had itself special components,and the percentages of constituents contained by both oils were different,for example eucalyptol 10.22 % (Henan Agricultural University) and 18.67 % (Changyuan),so different areas can affect the quality of Xinyi.