Abstract: The pursuit of highquality economic and social development and optimization of the supply side structure has been the main direction of national strategic development, exploring how to meet the needs of human development and sustainable development without damaging the ecosystem is a problem that human society must face and need to be solved. Based on the interaction mechanism framework of sustainable economic scale and ecological service function, this paper analyzed the changes of the overall ecological service value (ESV), ecological service pressure index (S), ecological service output capacity index (P) and sustainable economic scale (GDPc) of the four prefectures in Southern Xinjiang by using the decoupling theory. The results showed that: ESV of the four prefectures in Southern Xinjiang increased firstly and then decreased, reaching the maximum value in 2015 and starting to decline in 2020. From 1990 to 2015, the economic development of the four prefectures in Southern Xinjiang had little impact on the ecological environment. After 2015, the negative impact of economic development on ecological resources gradually emerged. The economic development and ecological environment of the four prefectures in Southern Xinjiang were in a decoupling state before 2000, and fluctuated from 2000 to 2015, and the decoupling state was most significant in 2020. The GDPc of sustainable economic scale of the four prefectures in Southern Xinjiang increased firstly and then decreased. Since 2015, the phenomenon beyond the sustainable scale has become more and more serious, and the contradiction between economic society and ecological system has become increasingly prominent. On the whole, economic growth, population increase and industrial efficiency improvement not only promote economic and social development, but also mean that human beings demand more from the ecosystem. The fragile ecological environment of the four regions in Southern Xinjiang cannot bear the rapid economic development. We should be aware of the fragility and irreversibility of the natural environment when considering the promotion of economic and social development, otherwise， economic and social development will be severely restricted by the value of ecosystem services.

Key words: sustainable economic scale, ecological service value, ecological exergy value, decoupling theory, four prefectures in Southern Xinjiang

摘要： 追求经济社会的高质量发展和优化供给侧结构已作为国家战略发展主要方向，探究经济社会如何在不损害生态系统的前提下满足人类发展需求并且维持可持续是人类社会必须面对和需要解决的问题。本文基于可持续经济规模与生态服务功能相互作用机理框架，借鉴脱钩理论，分析了新疆南疆四地州整体的生态服务效用ESV、生态服务压力指数S、生态服务产出能力指数P及可持续经济规模GDPc的变化情况。结果表明：新疆南疆四地州ESV呈现先增后减的变化特征，在2015年达到最大值，并于2020年开始回落；1990—2015年新疆南疆四地州经济发展对生态环境的制约影响较小，2015年后，经济发展对生态资源的负面影响逐渐显现；南疆四地州经济发展与生态环境在2000年前处于脱钩状态，2000—2015年在脱（复）钩起点上下波动，2020年复钩状态最显著；南疆四地州可持续经济规模GDPc呈先上升、后下降的变化特征，2015年开始超出可持续规模的现象越来越严重，经济社会与生态系统的矛盾也日益凸显。总体来看，经济的增长、人口的增加、产业效率的提高在推动经济社会发展的同时也意味着人类对生态系统更大程度的索取需求。南疆四地州脆弱的生态环境不能承受过快的经济发展，在考虑促进经济社会发展的同时应该意识到自然环境的脆弱性和破坏后的不可逆转性，否则经济社会的发展将会严重受到生态系统服务价值的制约。

关键词: 可持续经济规模, 生态服务价值, 生态价值, 脱（复）钩指数, 南疆四地州