Abstract:XI Jinping's thought of ecological civilization has inherited Marxist thought of ecological environment and effectively absorbed the wisdom and essence of traditional Chinese ecological civilization as well. On the basis of continuing development of thoughts concerning environmental governance of various leaders of our party and state, and grasp of issues concerning ecological envrionment and their governance practice since the foundation of People's Republic of China, XI's thought has achieved the innovative extenson in aspects of its systematic structure, epistemology and paractice.