以黄河流域9省区为研究对象，构建生态环境与共同富裕评价指标体系，采用耦合协调度模型，量化评估2000—2019年两系统间的耦合协调度，并对耦合协调类型进行分类和界定，分析其时空演化特性。结果表明：研究期内，黄河流域下游生态环境水平较稳定，上游和中游生态环境水平总体呈上升趋势，共同富裕上中下游呈先降后升的“对钩”型变化趋势；上下游地区耦合协调发展程度良好但不稳定，中游地区耦合协调发展程度较低且稳定；2000年以来，黄河流域各省区生态环境与共同富裕耦合协调度几度濒临失调，但是除甘肃外，其他省区近20年来生态环境与共同富裕之间的耦合协调度增长较快，呈现出南北高中部低的地理分布特征。

Taking the nine provinces and autonomous regions within the Yellow River Basin as research focus， we constructed an evaluation framework for ecological environment and common prosperity. Employing a coupling coordination model， we quantified the coupling coordination between these two systems for the period spanning from 2000 to 2019. We classified and delineated the various types of coupling coordination and examined their spatiotemporal evolution characteristics. The findings reveal that the ecological environment and common prosperity within the Yellow River Basin exhibited an overall upward trend from 2000 to 2019. Notably， the downstream ecological environment in the Yellow River Basin remained relatively stable， while the ecological conditions in the upstream and middle reaches generally improved. A distinctive "hook-shaped" trend was observed in shared prosperity， characterized by an initial decrease followed by an upswing in the upper， middle， and lower reaches. Furthermore， the coupling coordination in the upper， middle， and lower reaches displayed a "concave" development pattern with varying degrees of stability. While the coupling coordination development in the upper and lower reaches was promising but marked by instability， the middle reaches exhibited lower but consistent coupling coordination development. Since 2000， various provinces within the Yellow River Basin experienced periods when the coupling coordination between ecological environment and common prosperity teetered on the brink of imbalance. However， with the exception of Gansu Province， most provinces witnessed a significant acceleration in coupling coordination between ecological environment and common prosperity over the past two decades. This trend reflects a geographical distribution pattern characterized by "higher in the north and south， and lower in the central regions." This research serves as a basis for providing policy recommendations to facilitate the integrated development of the ecological environment and common prosperity within the Yellow River Basin.