本文收集了１１０例纵隔淋巴结正常者ＣＴ检查资料。按美国胸腔协会制定的纵隔淋巴结区域表，对纵隔各区正常淋巴结的数量、大小作了分析、研究。提出我国正常纵隔淋巴结ＣＴ标准为淋巴结短径≤８ｍｍ，研究发现，纵隔各区淋巴结的大小确有差异，因而提出了纵隔各区淋巴结的ＣＴ正常标准。同时发现，年龄与纵隔淋巴结大小成正相关（ｐ＜０．０５，ｒ＝０．７７１２），作者对此意义作了讨论。 This article collected 110 cases of normal mediastinal lymph node CT examination data. According to the American Thoracic Society developed mediastinal lymph node area table, the number and size of normal lymph nodes in the mediastinum area were analyzed and studied. Proposed China’s normal CT criteria for mediastinal lymph nodes lymph node short diameter ≤ 8mm, the study found that the size of the mediastinal lymph nodes are indeed different, and thus proposed the mediastinal lymph nodes of the CT normal standard. Also found that age and mediastinal lymph node size is positively correlated (p <0.05, r = 0.7712), the authors discussed the significance.