Objective To integrate the best evidence on the assessment and intervention for cancer-related anorexia in cancer patients, and to provide references for clinical practice. Methods We searched such databases or websites as UpToDate, BMJ Best Practice,World Health Organization （WHO）, Guidelines International Network （GIN）, Cochrane Library, PubMed, Embase, American Society of Clinical Oncology （ASCO）, CNKI, Wanfang Data,ect., to retrieve clinical decision reports,best practice reports,guidelines,expert consensus reports,systematic reviews,and evidence summary reports.The search time frame was from the establishment of the databases or websites to May 10th, 2023. Results A total of 15 publications were included, including 6 guidelines, 4 expert consensus reports, 2 systematic reviews, 1 evidence summary report, and 2 clinical decision reports.Totally, 21 best-evidence were summarized from four aspects of multidisciplinary team management, assessment, appetite regulation, and nutritional ma-nagement. Conclusion Healthcare professionals should pay attention to the management of cancer anorexia in oncology patients, and apply the best evidence for assessment and intervention in the context of clinical practice, in an effort to improve the quality of life of oncology patients.