Eucalyptus oil is one of the most commonly used essential oils. With the increasing popularity of candy and gum, eucalyptus oil has a main use as a food additive. Synthetic fragrances bring new influence and clean appeal to the cosmetic industry, such as toothpaste and oral cleansing products, and other household cleaning products, which also affect the fragrance of perfume. Eucalyptus oil, as an antibacterial agent, is also used in the pharmaceutical industry, especially in the treatment of respiratory tract infection and other similar diseases.