The manuscript of economic philosophy in 1844 and Capital are the concentrated embodiment of Marx's thought of ecological civilization.Through affirmation of the priority of nature,emphasis on the object-activity of sensibility,exposition of the dialectical relationship between man and nature,revelation of the root of the problem of capitalist ecological environment,and analysis of the path of socialization of ecological problems,Marx concentrated on his rich thought of ecological civilization.Marx's thought of ecological civilization has an important enlightenment for us to understand Xi Jinping's ecological civilization thought and carry out the practice of socialist ecological civilization construction with Chinese characteristics.