The invention relates to the technical field of daily necessities, in particular to an air freshener and a preparation method thereof. The air freshener comprises the following components: rhizoma coptidis, thyme essential oil, Chinese ivy leaves, tuber fleeceflower stems and platycladi seeds. In the air freshener provided by the invention, the main components contain traditional Chinese medicinematerials good for a human body, are favorable for people to sleep, can enter the human body through respiration to achieve a certain health-care effect, can freshen air and also can deorodrize competitiveness, cool and recover from fatigue as well as smooth breathing; furthermore, the added thyme essential oil can cover up peculiar smell well and also can cover up unique special odor in the traditional Chinese medicines; and the air freshener provided by the invention has nature, fresh, elegant and mellow fragrance and also can purify smoke. The preparation process is simple and convenient inoperation, has good market prospect and application value, and is suitable for large-scale production.