肠道是人体重要的消化和吸收器官，同时也是表面积最大的免疫器官，肠粘膜上皮细胞处于机体与外界抗原接触的第一线，表面表达一系列表面分子，在生理及病理情况下能分泌一系列细胞因子，在感染防御及抗原吸收、转运、提呈等方面具有重要作用，本文重点介绍肠上皮细胞的免疫学功能。 Intestinal tract is the body’s important digestion and absorption of organs, but also the surface area of ​​the largest immune organs, intestinal mucosal epithelial cells in the body and the external antigen in contact with the first line, the surface of a series of surface molecules, in physiological and pathological conditions can secrete a A series of cytokines plays an important role in defense against infection and antigen absorption, transport and presentation. This article focuses on the immunological function of intestinal epithelial cells.