中文摘要：

环境是影响企业经济活动的重要因素，应将其纳入到战略管理和经营决策中去，钢铁企业作为高碳排放、高能耗、高污染的代表尤应如此。借鉴国内外环境绩效评价标准，结合国内钢铁企业生产实践，从源头投入、末端排放、综合利用、关联管理四个方面构建了钢铁企业的环境绩效评价指标体系，并运用突变级数对指标进行耦合，建立了环境绩效评价突变模型，减少了人为对指标赋予权重的主观性，提高了评价模型的科学性。

英文摘要：

Environment is a key factor that influence economic activity of enterprises. It should be incorporated into strategic management and operating decisions, as representatives of high carbon emission, high energy consumption and high pollution, steel enterprises should do that in particular. Based on domestic and international environmental performance appraisal standards, combining with the production practice of domestic steel enterprises, this paper establish a new environmental performance appraisal model for steel enterprises from four aspects：source inputs, end emissions, comprehensive utilizations and associated management, then combine indexes by catastrophe progression method （CPM） to establish environmental performance appraisal catastrophe model. There is no weight in CPM, it reduces the subjectivity of assigning weights Artificially, and improves scientificalness of the model.