The paper aims to explore the construction of branding, ecology, marketization and visualization of regional ethnic festivals, understand the concept of regional festival culture, analyze the development of ethnic festival brands of regional culture, and promote the application of regional festival industry in practice. Under the guidance of the concept of ecological civilization, the design method of regional elements is used as the basis, taking the Dong "Yueye" festival in Guangxi as an example, and the genetic analysis and classification of the festival brand is carried out through field survey and literature analysis, and then the elements are extracted and their cultural connotations are summarized through the process of design element extraction. On the basis of the basic principle of preserving regional culture, through in-depth research and excavation of typical regional cultural elements such as Dong language and culture, festival customs and culture, local culture and ecological culture, and relying on the modern brand image design channel, the Dong "Yueye" festival brand design practice is carried out to show the unique image of Guangxi's local regional ethnic culture festival brand image design. The design of the festival branding practice of the Dong people is based on modern brand image design. The aim is to solve the problems of lack of brand image, insufficient cultural heritage and design homogenisation in the festival culture with regional characteristics, while the "Yueye" festival tourism, which integrates culture and tourism industry, provides a new development model for the modernisation and dissemination of the Dong traditional folk culture. The combination of distinctive regional cultural elements and the brand image of the festival has led to a more distinctive branding of regional festivals, actively promoting the dissemination of the regional brand image while making these festivals, which carry a unique regional ethnic culture become a business card, and contributing to the development of the cultural tourism sector.