Premature beats belong to the category of Chinese medicine “palpitations”, palpitations of yin deficiency can be used in the case of Colla Corii Asini. Palpitation is self-consciousness panic, heartbeat, can not be independent of the disease, palpitation of traditional Chinese medicine diagnosis has a distinction between deficiency and real, deficiency treatment should be tonifying qi, nourishing yin, nourishing blood, warming yang. The treatment of deficiency syndrome should tonify qi, nourish yin, nourish blood and warm yang. Colla Corii Asini is a solid gelatin made from the dried or fresh skin of donkeys of the family Equidae by decoction and concentration. It is sweet in flavor and flat in nature. Attributed to lung, liver, kidney meridian. It can tonify blood and nourish yin, moisten dryness and stop bleeding. It can be used for blood deficiency, dizziness, palpitation, muscle impotence, insomnia, internal movement of deficiency wind, lung dryness and cough, vomiting blood, urinating blood, blood in stool and leakage of blood (excessive menstruation or dripping), fetal leakage of pregnancy (small amount of vaginal bleeding in early pregnancy). If palpitations are caused by yin deficiency and fire exuberance (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire), Colla Corii Asini can be used, as it can nourish yin, so it can be taken under the guidance of a doctor.