Objective To evaluate the effect of flexible family visitation on delirium among patients in the intensive care unit, and to provide reference for targeted interventions. Methods We searched PubMed, Cochrane Library,Web of Science,Chinese Biomedical Literature Database (CBM), China National Knowledge Infrastructure (CNKI), and Wanfang database to retrieve randomized cli-nical trials reporting the effect of flexible family visitation on delirium among patients in the intensive care unit, from database inception to 13 January, 2023.Two researchers independently screened the literature, extracted the data and evaluated the bias risks of the included studies, then RevMan 5.4 software was used for meta-analysis. Results A total of 17 studies met the inclusion criteria, and the results showed that flexible family visitation could reduce the incidence of delirium ［OR=0.41,95%CI（0.31,0.55）,P＜0.05］.Conclusion Flexible family visitation can reduce the incidence of delirium among patients in the intensive care unit.