Accelerate the modernization of harmonious coexistence between humans and nature. It is the fundamental principle and action guide for China's ecological civilization construction in the new era. The construction of ecological civilization is the fundamental plan for the sustainable development of the Chinese nation. "Heaven and earth coexist with me, and all things are one with me." Human and nature are a community of life, and nature is the basic condition for human survival and development. Marx pointed out that "humans live by nature" and "humans are a part of nature", and that humans and nature are an inseparable organic whole. Throughout the history of human civilization, changes in the ecological environment often directly affect the rise and fall of civilization. The four ancient civilizations all originated in areas with dense forests, abundant water, and fertile land. The decline of ecological environment, especially severe land desertification, is an important reason for the decline of ancient Egyptian and Babylonian civilizations. The industrialization process since modern times has greatly improved the level of productivity and created unprecedented material wealth, but it has also caused many irreparable ecological wounds. Several environmental pollution incidents have occurred in some Western countries, triggering profound reflections on the development model of capitalism and Western modernization. People are increasingly realizing that the development method of killing chickens for eggs and fishing wholeheartedly has come to an end, and green development that conforms to nature and protects ecology is a clear indication of the future. The development process of Chinese civilization over 5000 years has accumulated rich ecological wisdom. Chinese civilization emphasizes the "unity of heaven and man" and "the law of nature", unifying heaven, earth and man, linking natural ecology with human civilization, and operating according to natural laws. It is sometimes chosen and used appropriately. In the great journey of uniting and leading the Chinese people to achieve modernization, the CPC insists on understanding the relationship between man and nature with a Marxist scientific attitude, dealing with the relationship between man and nature in a harmonious symbiotic way, and attaches great importance to the construction of ecological civilization and ecological environment protection. Since the reform and opening up, the Party and the state have established environmental protection as a basic national policy, incorporated it into the national economic and social development plan, proposed policies such as prevention first, "whoever pollutes will govern", and strengthened environmental management. Gradually, national and local environmental protection institutions have been established, laying a solid foundation for the cause of ecological environment protection.