The standard procedure for the treatment of pelvic ureteral junction stenosis is pyeloplasty. With the development and advancement of laparoscopic technology, laparoscopic pyeloplasty has gradually replaced the traditional open procedure, but the procedure is mostly a continuation of the traditional open surgery, in which the pelvis and ureter are anastomosed after dissection of the stenotic pelvic-ureteral junction in order to relieve the obstruction and protect renal function. To overcome this problem, Associate Professor Xuesong Li summarized the surgical experience of domestic and foreign scholars and developed a new and improved suture technique based on the traditional procedure. The key techniques of this suture method are: suture marking suture direction, clamping waste area anastomosis, and cutting while suturing. The modified suture method ensures accurate suture orientation while reducing anastomotic tension and decreasing the risk of urinary leakage. Compared with the conventional laparoscopic procedure, this modified procedure further shortens the operative time and reduces bleeding, while ensuring a high operative success rate (>96%).