Under the background of the 'dual carbon' goals and the green transformation of agriculture, the innovation of environmental management modes in leading agricultural enterprises in Liaoning Province has become a key factor in promoting regional agricultural sustainable development. Based on theories such as circular economy and technological innovation, this paper addresses issues such as passive environmental protection and insufficient technology application in enterprises in Liaoning Province, and designs a three-level environmental management innovation model of 'internal enterprise closed loop – industry chain collaboration – regional resource sharing.' An empirical test is conducted using Sanyou Agriculture as a case study. The data show that after implementing this model, the enterprise significantly outperformed the industry average in environmental performance, economic performance, and technological adaptability, achieving a win-win situation of 'enhanced efficiency through environmental protection.' The research findings not only enrich the theoretical framework at the intersection of agricultural economics and environmental management but also provide practical references for the green transformation of leading agricultural enterprises in Liaoning Province and for relevant policy-making.