In recent years, China's traditional culture has received increasing attention, "China-fashion wind" has risen, and the innovative application of traditional patterns has become a hot spot. With the Tianhua Brocade pattern in the Song Dynasty as the research object, the work aims to analyze and summarize the elements, skeleton structure, color matching and other art features of the Tianhua Brocade pattern from the perspective of image and typology through literature review and expert interviews. Then, digital technology and software are used to vectorize the pattern and establish the pattern database to realize the innovative application of patterns in costume design, in order to help promote the traditional Tianhua Brocade pattern in the new era and also provide new ideas for "China-fashion" costume design.