To study the health attributes of urban green spaces in the Yangtze River Delta. This study analyses the mechanisms at play between ecological preferences, place attachment and place identity in urban green spaces in the Yangtze River Delta based on SEM. AHP and entropy-weighted and TOPSIS were used to analyse the influence relationships and spatial differentiation structure of the health benefits of green spaces in the study area. The study shows that, firstly, environmental preferences have a significant positive impact on place attachment, place identity and health benefit evaluation. Place attachment mediates the positive influence of environmental preferences on health outcomes. Second, the focus should be on improving the activity spaces and services in urban green spaces. Attention should also be paid to increasing the density of interactive spaces and the richness of interactive space types. Third, the health indices in the Yangtze River Delta region are roughly proportional to the urbanization rate and the degree of urban development. Emphasis should be placed on the development of urban green spaces in Anhui, strengthening exchanges between cities in the Yangtze River Delta, and standardizing and improving the construction of green belts.