Abstract: In the world,the original cultures of ethnic groups came into being first,and then some of them developed into shared culture in the region and even in the whole world.The original culture of ethnic groups cultivated the shared culture of the world.The concept of original culture refers to the cultural phenomenon that the original culture can maintain its substantive characteristics and basic state after historical evolution of years,which keeps its stability with its original significance and state.Original culture is accepted by the world for its independent system.Originality is the most outstanding characteristic of original culture of ethnic groups,and the research for the originality provides help for the protection of diversity of culture and local knowledge.The theoretical construction for the original culture of ethnic groups is of vital significance for the heritage of traditional culture and the construction of socialist spiritual civilization.

Key words: ethnic groups, original culture, concept, theoretical construction