Objective To explore the experiences of patients with decompensated cirrhosis regarding self-management of nutrition and to provide evidence for formulating effective nutritional management plan in clinical practice. Methods A phenomenological research design was utilized. Semi-structured interviews were conducted among 13 patients with decompensated cirrhosis to gather qualitative data. Themes were identified using Colaizzi′s seven-step method of data analysis. Results Four main themes and seven sub-themes were identified:lack of intrinsic motivation, cognitive bias (insufficient knowledge and doubt about the efficacy of nutritional management), psychological distress (anxiety related to nutritional management, distress from dietary restrictions and a sense of deprivation of daily habits, and feelings of guilt towards the family), and insufficient external support (lack of professional guidance and help, and lack of social support). Conclusion Intervention on nutritional management for patients with decompensated cirrhosis is complex and challenging. Medical staff should provide patients with professional guidance and psychological support.