Plant essential oil microemulsion and preparation method thereof

The invention provides a plant essential oil microemulsion and a preparation method thereof. The microemulsion is prepared from components in parts by weight as follows: 2-4 parts of a mixture of origanum vulgare essential oil and thyme essential oil, 14-22 parts of food-grade Tween, 4-11 parts of ethanol and 65-80 parts of water. The plant essential oil microemulsion has acid and base resistance,salt resistance, sugar resistance and good stability under the synergistic effect of the components; the plant essential oil microemulsion is weakly acid, is a light yellow and transparent liquid inappearance, is particularly applicable to transparent products and has significant economic benefits. The microemulsion is an O/W (oil in water) system and can be diluted infinitely by water in any ratio, the problem of poor hydrophilic property of pure plant essential oil is solved, and the application range of the plant essential oil in the food field is greatly enlarged. The plant essential oilmicroemulsion takes water