Abstract: As a significant achievement of the Party's innovative theories, Xi Jinping's Thought on Ecological Civilization represents an original contribution. Its originality is reflected not only in theoretical innovation but also in leading practical transformation and methodological innovation. The theoretical contributions of Xi Jinping's Thought on Ecological Civilization are primarily manifested in the creative proposal of ecological ontology, which deepens the understanding of natural laws; the innovative theory of a new form of human civilization, which deepens the understanding of the laws of social development of human beings; the groundbreaking theory of green development, which deepens the understanding of the laws of economic and social development; and the strategic positioning theory, which deepens the understanding of the laws of the Communist Party of China's governance. The practical contributions of Xi Jinping's Thought on Ecological Civilization are mainly reflected in leading the historical transformation and achieving breakthrough progress on the path of ecological civilization in China. The methodological contributions of Xi Jinping's Thought on Ecological Civilization are primarily embodied in three principles: adhering to both breaking down and establishing while prioritizing establishment; maintaining stability while seeking progress and achieving goals step by step; and persevering with unwavering commitment for long-term success. The theoretical, practical, and methodological contributions of Xi Jinping's Thought on Ecological Civilization have strongly propelled the construction of ecological civilization under socialism with Chinese characteristics to a new level.