Objective To investigate the nephron-sparing surgery of selective blockage to renal segmentary artery.Methods The clinical data of 24 patients with T1 renal tumor underwent the nephron-sparing surgery of selective blockage to renal segmentary artery from January 2008 to January 2012were retrospectively analyzed.Two cases were tumors of solitarykidney,6 cases were disordered or with potentially impaired function at contralateral kidney,16 cases were with normal contralateral kidney.The tumor was lacated at superiorsegment in 8 cases,inferior segment in 7 cases,superior anterior segment in 2 cases,inferior anterior segment in 2 cases,posterior segment in 2 cases,superior segment and superior anterior segment in 3 cases.Twenty cases were exophytic and 4 cases endogenous.The diameter of tumors masses were from 2.2 cm to 6.8 cm,average diameter 4.2 cm.The average preoperative serum creatinine was 80 μmol/L(67-110 μmol/L).Results All operations were completed successfully.The average blood loss was 80 ml(60-120 ml),the average operative duration was 160 min(125-180 min),the average blockage duration of renal segmental artery was 25 min(15-26 min).The average postoperative serum creatinine was 81.4 μmol/L(71-155 μmol/L).Postoperative pathology:23 cases were renal clear cell carcinoma,1 case was chromophobe renal cell carcinoma.All cases were followed up from 6 to 36 months.The follow-up indicated there were no complications,such as bleeding,infection,perirenal visceral injury,pleural damage,pulmonary embolism,renal failure and liver failure and leakage,no tumor local recurrence and distant metastasis.However,there was temporary increases in serum creatinine in 1 case after operation.Conclusions The nephron-sparing surgery of selective blockage to renal segmentary artery is safe and effective,which can maximally preserve the unaffected renal parenchyma.