Objective To investigate the impact of Ruai-Kangfu decoction on the quality of life of the patients with breast cancer after operation.Methods A total of 107 patients with breast cancer who met the inclusion criteria were randomly divided into the control group (54 patients) and observation group (53 patients). The control group was treated with the radiotherapy and chemotherapy and symptomatic support treatment. The observation group was treated with the Ruai-Kangfu decoction on the basis of the control group. The 2 groups were treated for 12 months, followed up for 6 months. The European Organization for research and treatment of cancer life quality scale (quality of life questionnaire-core 30, QLQ-C30) and the living quality of breast cancer (quality of life questionnaire-breast table cancer module 23, QLQ-BR23) were used for assessing the quality oflife of the patients.Results After treatment, the scores of QLQ-C30 scale the body function (76.4 ± 16.6vs. 70.4 ± 16.4,t=-2.087), role functions (59.2 ± 12.8vs. 54.6 ± 12.8,t=-2.085), emotional function(77.2 ± 17.0 vs. 54.7 ± 12.8,t=-2.075), cognitive function (38.5 ± 14.7 vs. 34.3 ± 11.6t=2.104), social function(59.3 ± 12.4 vs. 54.6 ± 12.8,t=-2.105) and the overall health status (76.7 ± 19.7 vs. 65.5 ± 18.6,t=-2.152) in the observation group were significantly higher than those in the control group (P<0.05). The weary (40.9 ± 8.4 vs. 45.3 ± 9.6, t=2.149), nausea and vomiting (42.9 ± 8.8 vs. 44.9 ± 10.1,t=2.145), pain (36.9 ± 7.6 vs. 40.9 ± 8.7,t=2.143), dyspnea (44.8 ± 9.2 vs. 49.6 ± 10.6,t=2.148), insomnia (41.8 ± 8.6 vs. 46.3 ± 9.9,t=2.152), loss of appetite (35.0 ± 7.2 vs. 38.7 ± 8.2,t=2.113), constipation (15.9 ± 3.3 vs. 17.6 ± 3.8,t=2.057), diarrhea (15.2 ± 3.1 vs. 16.9 ± 3.6, t=2.092) scores in the observation group were significantly lower than those in the control group (P<0.05). The scores of QLQ-BR23 scale body type (74.7 ± 18.5 vs. 64.8 ± 15.4,t=-2.153), the function of sex (36.3 ± 9.0 vs. 42.8 ± 10.2,t=2.045), sexual fun (41.4 ± 10.2 vs. 48.9 ± 11.6,t=2.046), view of the future (67.6 ± 16.7 vs. 58.6 ± 14.0,t=-2.132), side effects (48.2 ± 10.4 vs. 55.2 ± 12.2,t=2.149), breast symptoms (39.6 ± 8.6 vs. 45.5 ± 10.2, t=2.127), arm symptoms (30.3 ± 6.6 vs. 34.8 ± 7.7,t=2.129), trouble from alopecia (36.1 ± 7.8 vs. 41.4 ± 9.1, t=2.113) in the observation group were significantly higher than the control group (P<0.05).Conclusions The Ruai-Kangfu decoction can adjust the mental status and improve the quality of life of patients with breast cancer after operation.