Abstract: The construction of ecological civilization needs to strengthen the ecological education for people, that is, to cultivate ecological awareness, learn ecological knowledge and improve ecological accomplishment. The "three cardinal guides and eight catalogues" in the Great Learning are the basic skills of Confucian moral cultivation. The cultivation way of "studying phenomenon of nature, pursuing knowledge, sincerity of thought, rectifying the mind, self-cultivation, unifying the family, ruling the country and stabilizing the world" has an important enlightening effect on ecological education. "Studying phenomenon of nature, pursuing knowledge" promotes people to learn ecological knowledge and understand nature; "sincerity of thought and rectifying the mind" can help people to eliminate material desires and cultivate people's love for nature, and "etiquette" can regulate people's external behavior, cultivate people's ecological morality, and form a fear of nature. At the level of "family and country", the family is the starting point of personal ecological education. The state carries out ecological education more comprehensively through school education and social education. At the "world" level, building a community of life can finally realize the harmonious coexistence between man and nature.