Objective：To explore the application of stentless laparascopic pyeloplasty in children with ureteropelvic junction obstruc－tion（UPJO）. Methods：Clinical data of 45 UPJO children underwent stentless laparascopic pyeloplasty from July 2015 to June 2016 were collected and matched with D-J tube drainage. The relevant clinical data were analyzed. Results：All operations were completed successfully without converting to open surgery. The postoperative hospital stay was shorter in stentless group than in D-J group [（8.64±3.18） d vs. （9.05±1.28） d，t=-0.789，P=0.434]；the mean operation time was shorter in stentless group than in D-J group [（98.39±18.02） min vs. （106.93±25.77） min，t=-1.81，P=0.077]，and no significant differences was observed. The postoperative uri－nary tract infection rate was lower in stentless group（3/45） than in D-J group（4/45） without significant differences（?字2=0.155，P=0.500）. Postoperative hematuria rate was higher in stentless group（5/45） than in D-J group（4/45） without significant differences （?字2=0.123，P=0.500）. The postoperative urinary extravasation rate was higher in stentless goup（13/45） than in D-J group（1/45） with significant differences（?字2=12.18，P=0.000）. Long-time follow-up showed all children were asymptomatic and hydronephrosis was relieved in varying degrees. Conclusion：Stentless laparas－copic pyeloplasty is feasible in the treatment of UPJO in chil－dren.