Objective To comprehensively search and summarize the evidence for non-pharmacological nutrition management in patients with cancer cachexia, and to provide reference for clinical nursing practice.Methods According to the "6S" evidence model, the evidence for non-pharmacological nutrition management in patients with cancer cachexia was systematically searched from domestic and international databases and websites, the retrieval time was from the establishment to September 2023.The quality of the included literature was critically appraised and the evidence were extracted, evaluated and integrated to form the best evidence.Results A total of 19 papers were selected, including 8 guidelines, 2 clinical decisions, 1 clinical pathway, 2 position papers, 3 systematic reviews, 1 evidence summary and 2 expert consensus statements.and 22 pieces of evidence were finally extracted and summarized from 3 aspects: assessment and diagnosis of cancer cachexia, multidisciplinary team and management objectives, nutritional support.Conclusion The best evidence for non-pharmacological nutritional management in patients with cancer cachexia can provide a decision-making basis for carrying out nutritional interventions in patients with cancer cachexia, and it is recommended that clinical healthcare professionals translate the evidence to combine the specific clinical contexts and patients′ wishes.