Medicinal eucalyptus oil includes blue eucalyptus oil, fornix rim eucalyptus oil, radiation eucalyptus oil, Raylin eucalyptus oil, etc., which has strong bactericidal and insect repellent effect. It is used as an oil to drive away wind, a cough suppressant, an anti-cold medicine, and a medicine to treat typhoid fever, diarrhea, hookworm disease and skin diseases; Used as glue, paste and preservative for fur. Spice type eucalyptus oil is mainly lemon eucalyptus oil, which is directly used as toothpaste, soap, food and other additives. Or mono citronellal and then chemical reaction to produce hydroxyl citronellal, thymol, citronellyl acetate and dihydrocitronellol. It is an important ingredient in the preparation of cosmetics and other fragrances. Industrial eucalyptus oil, such as the essential oil of eucalyptus radiata variety, can be used as a metal flotation agent and an additive in the paint industry.