Abstract: Objective To search, screen, evaluate and integrate the best evidence of perioperative nutritional management for patients with colorectal cancer by the concept of accelerated rehabilitation. Methods According to the "6S" model of evidence⁃based resources, we retrieved from top down the literature, in both Chinese and English, on the perioperative nutritional management of colorectal cancer patients by the concept of accelerated rehabilitation, in BMJ Best Practice, Up to Date, Joanna Briggs Institute for Evidence⁃Based Health Care Database, International Guidelines Collaboration, Website of National Institute for Health and Clinical Excellence, PubMed, Cochrane Library, Medline, CBMdisc, CNKI, Wanfang Database, Medlive, American Society for Enhanced Recovery, Chinese Medical Association, American Society for Parenteral Enteral Nutrition, and European Society for Clinical Nutrition and Metabolism. The extent of literature covered clinical decision⁃making, guidelines, expert consensus, and systematic evaluation (Meta⁃analysis). The search time limit was from the establishment of the database to November 2023. The quality of the included literature was independently evaluated by two researchers, and the references that met the quality criteria were analyzed. Results A total of 15 references including 7 expert consensus, 5 guidelines and 3 systematic evaluation were retrieved, summarizing 24 pieces of best evidence, which were grouped into 7 categories of nutritional treatment principles, preoperative education, preoperative nutritional screening and evaluation, preoperative nutritional support, preoperative fasting and drinking restriction, postoperative nutritional support and post⁃discharge nutritional support. Conclusions 24 pieces of the best evidence are summarized, from 7 aspects, on the perioperative nutrition management of colorectal cancer patients under the concept of accelerated rehabilitation surgery, which has good practicality and scientificity, and providing an evidence⁃based basis for medical staff to implement nutrition management.

Key words: Colorectal cancer；Perioperative；Nutrition management；Enhanced recovery；Summary of the best evidence