During the treatment of critically ill patients, the application of enteral nutrition is increasingly widespread, but its series of complications also deserve attention. Among them, the incidence of intestinal nutrition intolerance is as high as 30.5%-75%. In recent years, researchers at home and abroad have carried out researches on the evaluation and intervention of intestinal nutrition intolerance. The application of the research results has improved the nutritional tolerance of patients. In order to provide more comprehensive and new research information, the following review is now conducted.