The invention discloses a purely natural 
essential oil composition for keeping fresh and a preparation method and a using method thereof. 
Essential oil which is extracted from the natural substances of clove, cinnamon, caraway, garlic, seed of 
cuminum cyminum L. and fennel seed is prepared into an 
active packaging material with the functions of bacteriostasis and anti-oxidation according to a certain proportion, wherein the 
active packaging material has the characteristics of wide application range, naturalness, efficiency, no 
toxicity, simplicity and practicability, and can be widely used for packaging of foods such as fruits, vegetables, meats and the like; and the extraction method is an 
ultrasound-assisted extraction method. The 
essential oil composition can be used in various forms, namely the 
essential oil composition can be coated on the foods, can be used for soaking the foods, can be in the form of 
preservative bags, and the like. When packaging the foods, the essential oil composition can inhibit growth of microorganisms and 
resist oxidation at the same time, so that the 
shelf life of the fruits, the vegetables and the meats can be prolonged by 2 to 8 times, and the essential oil composition meet 
consumer psychology and has greater actual application value.