The application of Chinese herbal medicine originated from China medical academic "Shennong tasting a hundred herbs". Shennong Baicaojing, a classic of traditional Chinese medicine, records a lot of knowledge and experience in plant application. According to the Compendium of Materia Medica compiled by Li Shizhen in Ming Dynasty, more than 2,000 kinds of medicinal materials and 8,000 kinds of prescriptions are regarded as important reference materials for TCM health preservation and treatment. In addition, in the ayurvedic therapy in India, which has been used for 5000 years, many aromatic plants are also recorded for religious and medical purposes. The record of the real and extensive use of essential oils in history can be traced back to ancient Egypt. The most important origin history of China essential oil. Orange essential oil. In thousands of years of ancient Chinese pharmacopoeia books, there are detailed records of herbal treatment, which have continued to this day.

Aromatherapy refers to refining and extracting the essence of various aromatic plants between heaven and earth, and using their different characteristics and energy to adjust the physical condition. This is a peaceful and harmonious balance, which further stimulates the innate self-healing ability of human beings and promotes physical and mental health.

Hospital. Before the rise of chemical medicine and surgery in the18th century, aromatherapy was a well-known and trustworthy school.

Through learning, we realize that essential oil is a modern version of herbal medicine. In fact, for thousands of years, we human beings have been carrying the magical power of searching for natural herbs to cure diseases, so the experience that aromatic plants can cure diseases has been handed down and continues to this day.

Among the medicinal materials used by Chinese medicine since ancient times, plant medicine is the main one, so Chinese medicine is also called Chinese herbal medicine; Essential oil is extracted from aromatic plants, so Chinese medicine and essential oil are naturally related in medicine. But after all, essential oil is a mellow essence obtained by extraction. Compared with the original Chinese herbal medicine, it has higher concentration, easier absorption and more ways of administration. So there are some differences between essential oil and traditional Chinese herbal medicine. This paper will briefly introduce several prominent functions of essential oil from the perspective of traditional Chinese medicine, which will help to uncover some mysteries of essential oil in people's eyes, and make some medical analysis and explanation on its therapeutic effects, hoping to help everyone understand essential oil more correctly and not mystify its function or exclude it because of this mystery.

Essential oils extract the aromatic parts of plants, so from the perspective of traditional Chinese medicine, all essential oils belong to aromatic drugs first. In traditional Chinese medicine, the aromatic parts of drugs are used to treat diseases, and their functions are usually manifested in four aspects: eliminating dampness and turbidity, regulating qi and promoting blood circulation, warming the interior and dispelling cold, and refreshing the brain.

Essential oil belongs to aromatic drugs, so from the perspective of traditional Chinese medicine, it must have one or more of these four functions. Even if it is not used as an aromatic medicine as a Chinese herbal medicine, it will have the same characteristics as an aromatic medicine after being extracted because of the significant enhancement of its aromatic function.