In Chinese medicine, rosemary is warm and pungent in nature, and has its own effects of sweating, strengthening the spleen and stomach, and calming the mind. It can be used to treat cold headache at the beginning of a cold. In addition, it can also be used to treat the dampness blockage of the middle jiao caused by loss of appetite, epigastric distension, nausea and vomiting, or even spitting white mucus foam, sticky stools or loose stools, often such patients show that the tongue is fat, the tongue coating is relatively white, the pulse moistening thin. In addition, there is a very good tranquilizing effect, can improve the patient’s sleep condition, help patients sleep quickly. Modern pharmacology has confirmed that the volatile oil contained in rosemary, on the one hand, to help patients sleep quickly, in addition to improving the patient’s appetite, increase the role of gastrointestinal motility. In addition, rosemary in the volatile oil there is a certain enhancement of human metabolism, to improve the body’s glucose metabolism, to help diabetic patients to reduce blood sugar, but also to improve microcirculation, protect the heart, protect the liver, and reduce blood pressure, the human body has a variety of benefits. This is the efficacy and role of rosemary.