本文评述了涉及核电厂物项分级的法规、导则和标准。对不同文件中的安全分级、抗震分类、规范分级、质保分级进行了分析对比。对一些概念,如安全重要物项、安全4级、规范级与核级等进行了阐述、解释并提出了建议。对标准中存在的一些问题提出了看法。 This article reviews regulations, guidelines and standards that govern the classification of nuclear power plant items. The safety classification, seismic classification, standard classification and quality assurance classification in different documents are analyzed and compared. Some concepts, such as safety important items, safety level 4, normative level and nuclear level were described, explained and made recommendations. Some opinions on the problems existing in the standard are put forward.