Background: Clinical experiences and middle range Theory of Unpleasant Symptoms indicate that the existence of symptom clusters (SCs) may synergistically affect patients’ health-related quality of life (HRQoL). However, no studies have examined this issue. The aim of this study was to identify symptom clusters and quantify the synergistic impact of symptom clusters on health-related quality of life among patients with chronic obstructive pulmonary disease (COPD).Methods: Secondary data analysis of cross-sectional data collected via convenience sampling from patients with COPD in a Chinese university hospital. Assessments included modified MRC dyspnoea scale, Beck Depression Inventory, Beck Anxiety Inventory and Pittsburgh Sleep Quality Index. Health-related quality of life was assessed using the St George's Respiratory Questionnaire. Chi-squared tests were used to identify symptom clusters. Multiple linear regressions were used to examine associations between symptom clusters and health-related quality of life.Results: 106 COPD subjects were recruited. Three symptom clusters were identified in COPD patients and comprised of dyspnoea and depression (OR=2.69, 95%CI:1.19-6.02); anxiety and sleep (OR=2.72, 95%CI:1.20-6.15); depression and anxiety (OR=6.13, 95%CI:2.57-14.60). Two symptom clusters were identified in patients with severe-stage COPD, which were anxiety and sleep (OR=6.21, 95%CI:1.70-22.74), depression and anxiety (OR=5.33, 95%CI:1.64-17.40). All three symptom clusters (anxiety and sleep; dyspnoea and depression; depression and anxiety) were independently associated with health-related quality of life (β=14.56, 95%CI: 5.80-23.31; β =13.95, 95%CI:5.72-22.18; β=13.30, 95%CI:6.88-19.73).Conclusions: This is the first study to validate the synergistic impacts of symptom clusters on health-related quality of life in COPD patients compared with single symptoms. These findings, which offer a detailed understanding of symptom clusters present in COPD, provide a basis to guide efficient clinical assessment and management symptom-related distress.