The capitalization of costume culture within Chinese ethnic tourism villages offers a unique opportunity for the preservation and enhancement of this cultural heritage. Employing in-depth interviews with 20 professionals involved in operations, management, and commerce within these villages to facilitate a comprehensive analysis of their insights and experiences, leading to the identification of influential factors in the capitalization of costume culture, and the development of a corresponding factor model. The findings highlight the significant impact of the intrinsic characteristics of ethnic costume cultural resources, the external dynamics of market operations, and the preservation and evolution of costume culture on its capitalization. These insights offer practical recommendations for the sustainable advancement of ethnic tourism villages, emphasizing the optimization of internal resource attributes, leveraging external market opportunities, and prioritizing the continuity and innovation of costume culture.