With the popularization of the mobile Internet and the wide application of smartphones, the importance of the UI interface design of the small program, as an important window for the interaction between the brand and the user, has become more and more prominent. This paper adopts the KANO model to analyze the UI interface of the NAIS applet deeply and puts forward targeted improvement suggestions. Through the KANO model to analyze the basic needs, expectation needs and excitement needs of the target users, this paper aims to match the young aesthetics and shape a unique interface style through the three aspects of design style and color matching, interface layout and function setting, interaction optimization and kinetic effect design; optimize the user experience and enhance the operation convenience; strengthen the brand identity and improve the competitiveness of the market.