Objective To retrieve and obtain the relevant evidence of nutritional support in patients with inflammatory bowel disease(IBD),and to summarize the best evidence. Methods We systematically searched for the evidence on nutritional support for IBD patients in BMJ Best Practice,UpToDate,JBI,RNAO,SIGN,NICE,ESPEN,Cochrane Library,PubMed,CINAHL,Springer Link,Elsevier Science Direct,Ovid,Medlive,CNKI,CBM,Wan Fang and other databases,to collect relevant guidelines,systematic reviews,expert consensuses and original research. The retrieval period was from the inception to June 18,2020. JBI evidence appraisal and recommendation system was used to evaluate quality of studies and level of evidence. Results Totally 17 articles were selected,and a total of 21 pieces of best evidence were summarized from 6 aspects,including the diet of IBD,nutritional risk screening and nutrition assessment,energy and protein intake,micronutrient monitoring,nutritional support therapy,personnel support. Conclusion This study summarizes the available evidence on nutritional support for IBD patients,in order to provide evidence-based information for the clinical use of medical staff. Medical staff should make targeted choices and apply the best evidence based on clinical scenarios and patient preferences.