Garlic (Allium sativum L) is not only a kind of old-line flavoring but also a traditional Chinese medicine. Besides the active substances such as Allicin and sulfur compounds, it has abundantly trace elements, especially calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), manganese (Mn), phosphorus (P), selenium (Se) are very high, which make it have function to prevent cancer. Garlic is regarded as an economic vegetable, which is nutritious, flavoring and functional.In this dissertation garlic oil was extr...