Abstract: Leather, as an ancient material, has a history of application for tens of thousands of years. With the development of economy and society and the change of modern consumer demand, there are new requirements for the design and development of leather materials. Crossover design is the design means of the new era. The use of crossover design can make leather materials interact with each other in external aesthetic feeling and internal quality, and make the design of leather materials more innovative. The work Embroidery Red Flag, through crossover design method, digital technology, leather and intangible cultural heritage (referred to as "intangible") Shu embroidery technology cross-border integration, and applied to leather installation art. The experiment of process and process in the early stage of work design and development is helpful to the reasonable and orderly design of leather products. Through the design and production of leather products with Chinese characteristics and trend aesthetic characteristics, the cross-border cooperation between leather materials and traditional elements is realized, a new path of leather products innovation and development in the new era is explored, and new life vitality is injected into the modernization development of leather products.