With the popularity of Internet plus, both consumers and custom clothing enterprises have high demand for Internet online apparel customization. Interactive service is a new online service model, which provides a new concept of consumption. In view of the present situation of garment customization industry, we propose and study the design of interactive garment customization platform based on WeX5. Firstly, this paper introduces the key technologies used in the system, and points out the advantages of the application of mobile terminal mode customization. Then, it analyzes the requirements of customized apparel, and completes the design of mobile terminals.