Viewing from the main patterns of coke degradation in large blast furnace,as well as the internal and external factors of the degradation,reconsidering quality index of coke for the fur-nace is discussed.

• 从焦炭在高炉中劣化的主要方式及各种外部和内在因素，论述了当前大型高炉所用焦炭质量指标应重新选择的问题；