Abstract: Juvenile idiopathic arthritis is a group of chronic rheumatoid disorders in children，which has a high heterogeneity in the clinical features and prognosis，so it is extremely important to establish an effective classification criteria for the disease treatment and clinical research. The 2001 International League of Associations for Rheumatology（ILAR） classification criteria for JIA has been accepted and used worldwide for decades. With the more intensive research in the clinical characters and pathogenesis，and for the better harmonization with adult definition，the Pediatric Rheumatology International Trials Organization（PRINTO） revised the criteria in 2018，which rationality and practicality needs further validation. We interpret the two classification criteria，aiming at provide assistance in JIA diagnosis and differentiation.

Key words: juvenile idiopathic arthritis, classification criteria, expert interpretation

摘要： 幼年特发性关节炎（JIA）是一组儿童时期常见的慢性风湿性疾病，临床及转归都具有高度异质性，合理的分类标准对疾病的诊治及临床研究尤为重要。2001年国际风湿病联盟（ILAR）分类标准得到广泛认可及应用，随着对JIA临床特征及机制研究的不断深入，同时也为了使JIA患儿成年后更好接轨疾病命名，国际儿童风湿病国际试验组织（PRINTO）于2018年发表了新的JIA分类标准，其临床的合理性及可操作性尚需进一步验证。文章重点对两种JIA分类标准进行解析，旨在助力疾病诊断及鉴别。

关键词: 幼年特发性关节炎, 分类标准, 专家解读