The study of ritual music has become a hot topic in contemporary national music science, because the ritual music of different ethnic groups is the reflection of the national spirit and the national culture. As a branch of China’s ethnic Tibetan, Tibetan wedding ceremony in Lake music fully embodies this nation’s history, culture, religion, customs and religious beliefs, reflects the essence of national etiquette celebration. This paper explains the basis according to Tibetan culture music ceremony function, a detailed analysis of the role of entertainment, according to Nam Tibetan wedding music culture education and social functions, points out the protection and inheritance of lake according to the importance of Tibetan music culture. In order to protect and inherit the good lake in Tibetan ritual music culture, this paper also analyzes the current situation and problems of protection and inheritance, and puts forward corresponding suggestions and strategy.