Abstract: Under the guidance of the dual carbon target, energy-saving diagnosis has become an important means for leather industry to achieve green and high-quality development. Taking a cattle leather production enterprise as an example, this paper carried out the energy-saving diagnosis in which the focus was played on the analysis of production process, energy utilization, energy efficiency and energy management of this enterprise, and putted forward diagnosis suggestions such as the waste heat utilization of condensate water, the transformation of power distribution system, the replacement of high energy-consumption equipment, and the optimization of energy conservation management. By combing the experience and practice of energy-saving diagnosis in leather enterprises, this paper provided referential technical practice for leather industry to promote energy-saving diagnosis, solve common problems in the green transformation process of leather industry, and meet the individual development needs of leather enterprises.