The original design of the operating system UI, based on the graphic interactive operating system design theory, refers to the most popular operating system UI, has a popular appearance and excellent operating logic. The work uses Adobe After Effect and other tools to simulate and produce UI interface and dynamic effect. A large number of original designs such as desktop themes, application UI and dynamic effect, palette, buttons, etc. are designed. At the same time, various operation layouts and original functions are designed in the design process. First of all, deeply experience the UI design of the popular operating system, and combine relevant theoretical knowledge to design a UI interactive interface with bright colors and excellent interactive logic. Next, dynamic effects are added to the UI interface interaction so that users can obtain real-time and easy-to-understand interactive dynamic results. Finally, UI and dynamic design are made into CG animation. On the one hand, it is easy to provide front-end developers with easy-to-understand prototype design, on the other hand, the use of smooth and lively animation forms is easy to provide users with easy-to-understand interaction and use experience.