采用通过字典序偏好规避现实冲突中主体偏好难以定量化的图模型理论，对中线水源地生态环境多主体治 理冲突进行动态描述，分析冲突主体博弈的均衡解，探究冲突的动态演化。分析表明，中线水源地管理机构对地 方政府的激励有力地推动了中线水源地生态环境多主体治理冲突向均衡状态演化。中线水源地管理机构应结合 地方政府的发展需求，积极探索多种激励模式，引导地方政府积极参与水源地生态环境保护，最终形成水源地生 态环境治理的多主体合作局面。中线水源地生态环境多主体治理冲突是不断演化的，在一定时间及环境下的均 衡是暂时的，这种均衡会在水源地生态环境多主体的多轮博弈中向下一个均衡演进。

Several local governing bodies are involved in the ecological environmental management of the middle route of the South-to-North Water Transfer Project. As a limited rational economic person, considering their economic benefit, local governments make different action decisions and play games with each other, which have a negative effect on ecological environmental management.The graph model analysis method was used to dynamically describe the strategic interaction among the local governments in the ecological environment governance of water sources in the middle route. First, the main agents in the ecological environment governance in water resources and their respective strategy sets were analyzed. Then, based on the concept of lexicographic preference, the feasible statuses of the conflict were explored. The GMCRⅡ software with five different definitions of equilibrium of NR, GMR, SMR, SEQ, and SIM was used to analyze the equilibriums of the conflict. Finally, considering the actual situation of water resources in the middle route of the South-to-North Water Transfer Project, the dynamic evolution of the ecological environment governance conflict was shown by the diagram.In the process of ecological environment governance, incentive and compensation policies were used by the management institutions of water resources in the middle route to adjust the benefits of local governments, whose strategic choices turned to consider environmental governance. Based on the incentive and compensation policies, industrial support policies were used to adjust local governments’ benefits which resulted in changing their strategic choices to emphasize environmental governance.The result showed that the incentive policies used by management institutions of water resources in the middle route can effectively promote local governments to actively participate in the ecological environment governance, and promote the ecological environment governance conflict to evolve into a state of equilibrium. It is an effective way for the management institutions of water resources in water source of the middle route to guide local governments to cooperate by exploring a variety of incentive models in combination with the development needs.