The Dong costume patterns in Qiandongnan have a long history and distinctive regional cultural characteristics, and their patterns contain high cultural and emotional values. Nowadays, the development of traditional patterns and cultural symbols of Dong costumes is facing many new challenges, which require expanding the application carriers of the patterns and giving them a new life. This is the value of inheritance, revitalization, and innovation of costume patterns, as well as a new direction for the development of Dong traditional costume patterns. In this thesis, the origin, connotation, and cultural symbols of Dong costumes in Qiandongnan are studied in depth, aiming to explore their role in Dong's cultural inheritance. Through the historical tracing and cultural connotation analysis of Dong costumes, we find that they are not only a decorative tool but also a vivid expression of Dong culture relying on the profound historical background. Through the comprehensive study of Dong costumes, the cultural heritage of traditional patterns of Dong costumes not only provides strong support for the cultural inheritance of the Dong people but also provides useful inspiration for the protection and inheritance of other ethnic cultures. By strengthening the cognition and dissemination of cultural symbols, we are expected to promote exchanges between different cultures and realize communal development.