Objective To summarize the best evidence of perioperative nutritional support in patients with hepatectomy. Methods We searched related evidence in Cochrane Library,National Guidelines Clearing House,Scottish Intercollegiate Guidelines Network,PubMed,JBI,BMJ,Canadian Clinical Practice Guidelines Database,CNKI,Wanfang,International Guidelines Network,SinoMed,nutrition-related websites from their inception to September 9,2021. Article quality was evaluated by critical appraisal tools of JBI evidence-based healthcare center and evidence was summarized. Results This study finally included 8 articles,including 5 guidelines and 3 expert consensuses. We summarized 21 pieces of evidence in 5 dimensions,including screening for nutritional risk,measures for preoperative and postoperative nutrition,multidisciplinary nutrition patterns,and health education and follow-up. Conclusion The best evidence summarized in this study is specific and comprehensive. It can provide reference for health professionals in their clinical practice.