The invention relates to a method for simultaneously extracting 
alliin and garlic 
enzyme from garlic, which comprises: full ultrasonic 
cell wall breakage of mixture of peeled garlic and a polar 
organic solvent with the 
mass being at least four times of the 
mass of the garlic (pharmaceutically acceptable) and the volumetric 
water content less than or equal to 10 percent under the conditions with the pH being 5.5-6.8 and the temperature being less than or equal to 35 DEG C, 
solid-liquid separation, 
filtration and separation of supernatant by molecule 
ultrafiltration membranes with the molecular weight reducing gradually, wherein the molecular weight of the molecule 
ultrafiltration membrane at the last stage is 10,000 to 3,000, concentration of the filtrate by a nano 
filtration membrane, 
crystallization of the concentrated solution, separation to obtain crystals, and 
drying under conditions with the temperature less than or equal to 35 DEG C. The problem of reaction of the 
alliin and the garlic 
enzyme in 
cell wall breakage of the garlic can be solved effectively, and garlic extracts with the 
alliin content being 2.2-98 percent and the activity ratio of the garlic 
enzyme being 80-900 can be extracted and enriched, the losses of effective ingredients can be reduced, the yield and purity can be improved, the cost is low, the production requirements of cleanness and low 
energy consumption can be satisfied, and the method has a practical value in industrial applications.