Abstract:The petrochemical industry is not only a pillar industry in Chinese national economic development, but also plays a key role in?monitoring?carbon emission in China. The development of a scientific and effective low-carbon management evaluation system has a positive effect on low-carbon industries.?Ethylene industry,?as an important symbol of the development level of petrochemical industry, is of great importance to the low carbon?management index system?of the whole chemical industry.?Based on this idea, this paper attempts to develop a multi-level low-carbon comprehensive evaluation index system, and combines the VIKOR algorithm with the improved gray relational algorithm to form a comprehensive evaluation model of VIKOR-gray correlation degree. We also select enterprise A as a case study on the proposed index system. Finally, the paper gives some suggestions on improving low-carbon management among ethylene industries.