PURPOSE: To examine effects of music therapy and progressive muscle relaxation training on depression, anxiety and length of hospital stay in Chinese female breast cancer patients after radical mastectomy. METHODS: A total of 170 patients were randomly allocated to the intervention group (n = 85) receiving music therapy and progressive muscle relaxation training plus routine nursing care and the control group (n = 85) receiving routine nursing care. Music therapy and progressive muscle relaxation training were performed twice a day within 48 h after radical mastectomy, once in the early morning (6a.m.-8a.m.) and once in the evening (9p.m.-11p.m.), for 30 min per session until discharged from the hospital. RESULTS: A general linear model with univariate analysis showed that the intervention group patients had significant improvement in depression and anxiety in the effects of group (F = 20.31, P < 0.001; F = 5.41, P = 0.017), time (F = 56.64, P < 0.001; F = 155.17, P < 0.001) and group*time interaction (F = 6.91, P = 0.009; F = 5.56, P = 0.019). The intervention group patients had shorter length of hospital stay (12.56 ± 1.03) than that of the control group (17.01 ± 2.46) with statistical significance (F = 13.36, P < 0.001). CONCLUSION: Music therapy and progressive muscle relaxation training can reduce depression, anxiety and length of hospital stay in female breast cancer patients after radical mastectomy.