Abstract: A set of solvent-free microwave extraction device was set up by using modified ordinary household microwave oven. The chemical constituents of volatile oil of Magnolia heptapeta (Buc’hoz) Dandy were extracted by solventfree microwave extraction (SFME) and traditional steam distillation(SD). The chemical constituents were separated and identified by GC/MS. The relative content was performed by peak area normalization. The results show that there is no obvious difference in the quality of volatile oils obtained by two kinds of extraction methods, but the yield of SFME is 0.80％, which is higher than the yield of SD (0.68%). There are some advantages of the modified homemade SFME device: the price is low and it can be promoted easily. The SFME method offers important advantages over SD: shorter extraction times, substantial savings of energy and a reduced environmental burden. SFME is a non-pollution green technology and as a good rapid and high yield new method for the extraction of volatile oils from fresh aromatic plants.