活动断裂分段在重大工程地震安全性评价中具有特别重要的意义，但无论是方法本身还是实际应用都存在着有待于进一步研究和解决的问题，这些问题不解决，可能造成不良的后果。利用国际上公认的分段研究工作最深入、段落划分最可靠的３条活动断裂的分段依据，分析和评价了所使用的方法和标志以及它们的不确定性，结合中国活动断裂的特殊性和重大工程地震安全性评价对活动断裂的特殊要求，提出４个分段准则。 Active fault segmentation is of particular importance in the safety evaluation of major engineering earthquakes. However, there are problems to be further studied and resolved both in the method itself and in practical application. If these problems are not solved, they may have adverse consequences. Based on the most reliable and internationally agreed sub-study of the three active faults, the methods and symbols used and their uncertainties are analyzed and evaluated. Based on the particularity of the active faults in China, And the major project earthquake safety assessment on the active fracture of the special requirements, proposed four sub-criteria.