Objective To investigate clinical efficacy of finasteride on chronic heart failure(CHF)complicated with benign prostatic hyperplasia(BPH)in elderly patients. Methods 100 cases of elderly patients with CHF complicated with BPH were chosen,according to the number table method,they were divided into the observation group and control group,50 cases in each group,all patients were treated according to their cardiac function to regulate anti-CHF therapy.The patients in the observation group were added with finasteride treatment,the control group placebo treated patients,the measurement indexes were compared between the two groups after treatment,including prostate volume,N terminal pro brain natriuretic peptide concentration,creatinine,international prostate symptom score and symptom score,need operation treatment intervention,incidence acute urinary retention rate. Results After treatment, the prostate volume,N terminal pro brain natriuretic peptide concentration,creatinine,international prostate symptom score of symptom scores of the observation group were(23.86±10.27)m L,(352.63±72.55)g/L,(84.0±11.6)mol/ L,(9.3±4.9),those in the control group were(39.11±12.53)mL,(483.46±76.47)g/L,(99.0±12.8)mol/L,(13.9 ±5.6).The difference was statistically significant(t=9.47,17.56,12.33,8.48,all P<0.05);the observation group need operation treatment intervention was 16.0%,obviously less than 52.0%in the control group,there was significant difference between two groups(χ2=21.85,P<0.05);acute urinary retention in patients with the observation group the incidence rate of 14.0%,significantly lower than 38.0%in the control group,there was significant difference between two groups(χ2=12.83,P<0.05). Conclusion Patients with CHF complicated with BPH aged at the same time standard anti heart failure treatment using finasteride,significantly reduce the prostate volume,reduce the measurement indexes,and significantly reduce the rate of operation intervention patients,safe and reliable,which is worthy of clinical application. Key words: Heart failure; Hyperplasia of prostate; Finasteride; Aged