With the intensification of global urbanization and population aging, the optimal design of age-appropriate public space has become an important issue in current urban planning and sustainable development. However, in the process of pursuing functionality and modernization, modern urban landscape often ignores the inheritance and expression of local culture, resulting in the gradual disappearance of traditional cultural elements. Qiwa Dang pattern, as an important part of traditional Chinese architectural decoration, contains rich cultural significance and symbolic value, but its application in contemporary landscape is still relatively limited. Therefore, this study proposed a design method for age-appropriate public space based on parametric modeling. An adjustable Zivadan pattern model was constructed with Rhino and Grasshopper, and the design scheme was optimized through simulation to improve the age-appropriate performance and cultural identity of public space. Firstly, the geometric features of aligned tile patterns were analyzed digitally, and an adjustable parametric model was established to apply to landscape elements of different scales and functions, such as shading structure, paving design and seating facilities. Then, based on the ENVI-met simulation tool, the thermal comfort and light environment adaptability of the design scheme were evaluated to optimize the spatial layout and improve the comfort and safety of outdoor activities for the elderly. At the same time, the space use pattern of the elderly was analyzed in combination with behavioral simulation to adjust the design parameters to ensure that the public space can not only meet the physiological needs, but also promote social interaction and enhance the sense of belonging and mental health of the elderly. The research results show that the Qiwadan pattern based on parametric design can not only flexibly adapt to different spatial needs, but also enhance cultural experience and visual identity while improving environmental comfort. The simulation analysis found that the shading structure optimized by the Qiwadang pattern can effectively reduce the temperature of the outdoor activity area and improve the thermal comfort. Meanwhile, its geometric arrangement can also enhance the guidance of the space and improve the spatial cognition ability of the elderly. In addition, by adjusting the scale and density of the aligned tile patterns, the light and shadow effects can be optimized, adding dynamic beauty to the public space and creating a landscape environment with more cultural significance and artistic appeal. The aging design strategy of "parameterization + cultural symbol" proposed in this study not only provides a sustainable landscape design method, but also explores a new path for the application of traditional culture in modern urban space.