In the era of metaverse, digital twin technology is not only applied to traditional industrial and aerospace fields but also begins to empower fashion design and intelligent manufacturing, ushering in a new business model and a new era of value creation. This article discusses the application of digital twin technology in the fashion industry and the digital value it brings. In the fashion industry, digital twin technology is mainly applied in five areas: the design and development of fashion products, identity verification, tracking the entire lifecycle of fashion products, intelligent manufacturing of digital twin clothing factories, and immersive experience of fashion display. In addition, digital twin technology realizes the digital value added to clothing by connecting to NFT ecosystems, games, and other emerging fields. On the one hand, the value of physical clothing is enhanced by using physical products plus digital products; on the other hand, digital-twin clothing as independent digital assets opens up new markets and business models, providing new ways for brands to extend their influence into the virtual world. Digital twin technology has revolutionized the traditional mode of the fashion industry, created new business opportunities and value growth points for it, and will further promote the industry's digital transformation and intelligent development in the future.