Flat Research on the Design and Application of Icon Design in Mobile Phone UI Interface

s: Flat icon design has been widely applied in web pages and mobile phone UI interface, and has been widely praised for its simplicity, clear color, and directness of information. With the rapid development of Internet e-commerce, according to the survey report of China Internet Network Information Center CNNIC (the 45th), until March 2020, the scale of China's mobile phone netizens has reached 897 million. Mobile phone has become an indispensable part of People's Daily life. It not only provides convenience for people's life and shopping, but also becomes a platform for people's work, study and education. The development of multimedia mobile phones has promoted the flat icon design to flourish. Through analysis and research in this paper, it is concluded that the UI interface flat icon has distinct visual characteristics: concise graphic design elements, strong visual impact color design, distinct order, and so on. According to the visual performance characteristics of the flat icon, a large number of cases are analyzed to obtain the style classification and specific design method of the flat icon design. Therefore, this paper hopes to provide references for relevant designers by analyzing and studying the features of flat icon and design method.