As a part of the culture of Tibetan medicine, the Nectar Offering has a long history of a thousand year. There are some contents of Esoteric Sect in its ritual procedure. It was improved and established a special theory in the development. On the basic of literature research and investigating the senior inheritors, the contents of ritual procedure, including instrument, participants and procedure, its characteristics and significance were introduced. Nowadays, the culture of Nectar Offering is diluted gradually, and facing the danger of disappearing.