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Eco-industry, circular economy, cleaner production, industrial ecology or industrial ecosystem and other subjects are all categories related to sustainable development. This paper studies the relations and differences between the four categories and sustainable development as well as ecological economics. Circular economy, eco-industry,industrial ecosystem and cleaner production were put forward during the revolution in end treatment patt of traditional industrial society. Industrial ecology, eco-indtustry and circular economy theory are three content expansions of cleaner production. Ecological economics is of instructive function theoretically and methodologically for circular economy, eco-industrial, cleaner production and industrial ecology. Circular economy theory is easier to be accepted,compared with ecological economics theory. And circular economy in nature is the complete application of ecological economics theory.