Objective To observe the therapentic effects of Tamsulosin for the treatment of benign prostatic hyperplasia(BPH).Methods 100 outpatients with benign prostatic hyperplasia received were selectived,and were randomly divided into two groups.The experimental group(50 patients)given Tamsulosin 0.2 mg once a day,and the control group(50 patients)received Tamsulosin 0.2 mg once a day and Finasteride 5 mg once a day both.Observed the efficiency of the drug therapy,mainly the improvement of the lower urinary tract symptoms(LUTS).Results The lower urinary tract symptoms had improved effectively in 1 month,in the experimental group has 49 patients(98%),and the control group has 48(96%),the difference between the ex-perimental group and the control group has no statistical significance(P 0.05).Both Of the two groups,the IPSS ≤13 points,the QOL is 3 ± 1 points,Qmax≤18 ml/s,the residual urine volume≤40 ml,the difference has statistical significance(P≤0.05).Conclusion The single therapy by Tamsulosin has a satisfactory clinical effect on the the treatment of LUTS caused by BPH.