Objective  To investigate the clinical application of retroperitoneoscopic dismembered pyeloplasty for pediatric ureteropelvic junction obstruction(UPJO) Methods  Retroperitoneoscopic dismembered pyeloplasty was performed on 16 patients of pediatric ureteropelvic junction(uPJ)obstruction. There were 11 men and 5 women. Their age ranged from 3.5 to 12 years (mean,6.5 years). The right 7 cases and left 9 cases. There were one case was compression from crossing vessels and one case was complicated with pelvic stones.  Results  retroperitoneoscopic dismembered pyeloplasty for pediatric ureteropelvic junction obstruction was performed successfully in all 16 cases. The operative time ranged from 110 to 175 min(mean, 130min). The blood loss ranged from 20 to 60 ml(mean, 35 ml). The postoperative hospital stay time ranged from 6 to 11 day (mean, 8d). During the follow-up ranged from 3 to 36 months (mean,18 months), no anastomotic stoma stricture of UPJ developed; and hydronephrosis resolved.  Conclusion  Retroperitoneoscopic dismembered pyeloplasty is a safe，effective and mini-invasive procedure for pediatric ureteropelvic junction obstruction，with a rapid postoperative recovery．It will be the ideal treatment forUPJO in pediatric patients and worthy to be extended of clinical .