Abstract:Industrial cluster, as a sustainable form to reduce waste of resources and environmental pollution, is an important way to promote the construction of circular economy and ecological civilization. It is necessary to take the eco-efficiency of energy-intensive industrial cluster as a compound system composed of resource efficiency and environmental efficiency from the perspective of industrial cluster, and to research the level of synergetic development and the influencing factors of the composite system. On the basis of accurately measuring the eco-efficiency of the energy-intensive industrial cluster, the paper measures the synergetic development level of the complex eco-efficiency system, analyzes the key influencing factors of the synergetic degree of the eco-efficiency system, and provides theoretical support and practical reference for promoting the circular economy construction of industrial cluster and speeding up the upgrading of energy-intensive industries.