Liping Dong nationality big song is a kind of folk choral music sung by folk choirs in the southern dialect area of Dong nationality in China. It is mainly popular in the southern part of Liping County and the northern part of Congjiang County bordering it, including Yandong, Koujiang, Shuangjiang, Yongcong, Zhaoxing, Shuikou, Long'e in Liping County and Wangdong, Guping, Gaozeng, Guandong, Luoxiang and other towns in Congjiang County. Folk customarily calls these areas "Six Caves" and "Nine Caves". Dong nationality big song has a long history. As early as the Song Dynasty, it had developed to a relatively mature stage. Lu You, a famous poet in the Song Dynasty, recorded the collective singing of "Ge Ling" (the self-proclaimed name of Dong people) in his "Notes of Lao Xue'an". In the Ming Dynasty, Kuang Lu recorded more clearly the scene of Dong people "singing with eyes closed" in his book "Chi Ya", which is an important document of Dong nationality big song singing hundreds of years ago. Da Ge is usually sung in the occasion of collective visits between villages or clans. It is the core content of cultural and emotional exchanges among the Dong people. To some extent, it embodies and conveys the soul of Dong culture. Liping Dong Da Ge is one of the most distinctive Chinese folk music arts, and it is also a rare shining pearl in the international folk music art garden. As a polyphonic folk song, it has achieved a level rare in the world in terms of polyphonic thinking, polyphonic form, chorus skills, and cultural connotation. Representative repertoires of Dong Da Ge include "Ye Lao Ge", "Ga Gao Sheng", "Ga Yin Ye", "Ga Xi", etc. Liping Dong Da Ge inherits the history and culture of the Dong people with its unique singing style and special organizational form. It is not only a kind of music art, but also an important part of the social structure, marriage relationship, cultural inheritance and spiritual life of the Dong people. It has many repertoires and extremely extensive content. It has research value in social history, marriage history, ideological history, education history, etc., and is the spiritual pillar to maintain the survival of Dong society.