Objective To search and select the evidence related to perioperative nutritional management of gastric cancer,and to summarize the best evidence. Methods We retrieved the BMJ best practice,Up to Date,Guidelines International Network,Medlive,National Institute for Health and Care Excellence,Scottish Intercollegiate Guidelines Network,Registered Nurses Association of Ontario,JBI,National Comprehensive Cancer Network,European Society for Clinical Nutrition and Metabolism,Chinese Society For Parenteral and Enteral Nutrition,American Society for Parenteral and Enteral Nutrition,Cochrane Library,PubMed,CNKI,Wanfang Database,VIP,SinoMed,and collected relevant clinical decisions,guidelines,evidence summaries,expert consensuses and systematic reviews. The search time limit was from January,2012 to April,2022. There were 2 researchers who evaluated the quality of the included literature,and extracted and summarized the evidence. Results A total of 15 articles were included,including 1 clinical decision,4 guidelines,1 evidence summary,5 expert consensuses,and 4 systematic reviews. 28 pieces of evidence were summarized,including nutritional risk screening and assessment,multidisciplinary team,general principles of nutritional support,preoperative nutritional support,postoperative nutritional support,discharge and follow-up. Conclusion The best evidence in this study is scientific and systematic,providing evidence-based interventions for medical workers to implement nutritional management of perioperative gastric cancer patients.