Abstract
Does Marxist philosophy and economics contain ecological thought? Does Marxist unified ontology amount to ecological thought? Whatever the answer, ecology was not the original intention of Marx. In Marx’s view, nature refers to objective nature, as the medium of subjective practice, and man is realistic man as the natural beings. Unification of the two sides makes clear the substantive characteristics of Marxist ecological thought - dual realization of humanism and naturalism - which in Marx is a principle thought. Probing this question, how to achieve the goal of dual realization in historical dialectics, is the mission of academic research.