<p>The rapid development of cities has led to increasingly severe urban ecological and environmental problems, making the assessment and improvement of urban eco-environmental quality (UEQ) critically important. However, previous studies have primarily focused on the macro scale, with limited attention given to the influence of urban morphological factors on UEQ at the meso-and micro-scales, particularly from the block perspective. Taking the central urban area within the Third Ring Road of Fuzhou as a case study, this research employed a random forest regression model to investigate the seasonal effects of urban morphology on UEQ. The results show that, regardless of season, high-density blocks exhibited the lowest remote sensing ecological index (RSEI) and the highest distribution index. The relative contribution of different urban morphological indicators revealed that vegetation pattern indices consistently played a dominant role across all four seasons, contributing 46.04%, 59.11%, 43.5%, and 29.78% to the RSEI in spring, summer, autumn, and winter, respectively. Partial dependence analysis further indicated that vegetation height, largest patch index of vegetation, and aggregation index of vegetation all had positive effects on RSEI across seasons, with vegetation heights between 8 and 15&#xa0;m having the most significant impact. In contrast, floor area ratio, average building height, and largest patch index of buildings were found to have a negative effect on ecological quality. Moreover, the interaction effects between key factors suggest that UEQ is jointly influenced by multiple factors. Therefore, urban renewal strategies should take into account the interactions among various indicators to maximize improvements in ecological quality. These findings provide valuable insights from a block perspective for enhancing UEQ.</p>