Abstract:【Objective】 To evaluate the feasibility and clinical value of transperitoneal laparoscopic dismembered pyeloplasty combined with lithotomy with ureteroscope. 【Methods】 Of the 9 cases of ureteropelvic junction (UPJ) obstruction and renal calyx caliceal stones who underwent transperitoneal laparoscopic dismembered pyeloplasty combined with lithotomy with ureteroscope. 7 males and 2 females, of whom 6 had severe hydronephrosis; 3 intermediate. Upper renal calyx caliceal stones 3 cases, middle 5 and lower 2. 【Results】 The operation was successful in all cases, operative time was 120~200 min , with an average of 140min, blood loss was 40~150 mL, with an average of 70 mL, hospital stay was 7~10 d, with an average of 8.2 d, there was no urine leakage and residual stones of all cases. Follow-up of 6~12 months showed there was no stricture at UPJ and hydronephrosis was remitted (intermediate hydrops in 2 cases, mild in 5 and resolution in 2). The renal functions were distinctly improved. 【Conclusion】 Transperitoneal laparoscopic dismembered pyeloplasty combined with lithotomy with ureteroscope was effective, and deserved further clinical application.