Abstract: Objective: To evaluate the therapeutic efficacy of transurethral resection of the prostate(TURP) for the patients of benign prostatic hyperplasia(BPH) whose prostate weighing less than 30 g.Methods: Seventeen patients of BPH with the weight of prostate less than 30 g were received TURP and catheterization,hemostasis and anti-infection treatments after operation.Results: All of the operations were succeeded,no operation was interrupted or stopped due to the bleeding,the operation time was between 40-95 minutes,no transurethral resection related syndrome(TURS) happened in these patients who received TURP.The average score of international prostate symptom score(IPSS) of these patients was 13 one day after remove of catheterization.Conclusions: For the patients of BPH with the weight of prostate less than 30 g,the symptomatic reason of lower urinary tract should be explored before operation,and the operation methods should be selected according to patient's condition,thus the efficacy of operation would be reliable.