Abstract: Based on the ideas of Marx, Kohei Saito critically draws on the “de-growth” economic theories of the Western left, and attempts to construct an ideal model of an ecological civilization characterized by shared wealth, common governance, municipal autonomy, and economic homeostasis-“de-growth communism”. This theory profoundly criticized the imperialist way of production and life and enriched the theoretical connotation of eco-socialism. However, in his study of “de-growth communism”, Kohei Saito overemphasized the analysis of Marxism from an ecological point of view, and put forward the view that Marx opposed the development of productive forces in his later years, which is suspected of “utopian”. At the same time, his theory also opposes economic development and environmental protection to a certain extent, deviating from Marxs dialectical view of nature.

Key words: Kohei Saito, Marxs ecology, de-growth communism, criticality, wealth in common