The work aims to explore how to integrate the urban cultural characteristics into the design of leisure furniture better through the in-depth analysis of Beibu Gulf urban culture by the theory of cultural semiotics, so as to provide new design ideas and methods. With Lomantian cultural semiotics as the theoretical foundation, based on the principle of "symbol-text-culture-symbol domain", starting from the text, the cultural symbols were extracted, the Beibu Gulf urban cultural symbols and design elements were refined, the relevant cultural symbol elements were summarized and the urban cultural symbol domain was formed to guide the design practice of leisure furniture.A complete closed-loop design system of "text-symbol-culture" is constructed to obtain the Beibu Gulf cultural symbol library, and carry out the design practice of leisure furniture with artistic coding without extension and social coding with coexistence of extension and connotation, thus summarizing the unique symbol extraction principle and design method. The construction of systematic urban cultural symbol art coding and translation is a deeper interpretation and transmission of urban culture, thereby enhancing the urban image and cultural confidence.