Abstract: Objective：To explore the treatment effect of tipflexible ureteroscope treatment in impacted upper ureteral calculi.Methods：61 cases of impacted upper ureteral calculi were selected as the research object，which divided into either the study group（treatment with tipflexible ureteroscope，n=34）and the control group（treatment with retroperitoneal laparoscopic ureterolithotomy，n=27），and their clinical data was analysised.Results：The amount of bleeding（6.76±2.43）ml 、the operative time （58.85±35.30）min and hospitalization time（11.76±4.02）d in the study group were less than that of the control group [（16.85±9.11）ml，（150.93±54.69）min and（15.26±2.92）d]，and the difference was statistically significant（P<0.05）.Postoperative complications in the study group（5 cases，14.71%）were lower than those in the control group（4 cases，14.81%），and the difference was not statistically significant（P>0.05）.The rate of stone clearance in the study group（33 cases，97.06%）was higher than that in the control group（26 cases，96.30%），but the difference was not statistically significant（P>0.05）.Conclusion：Strictly grasp the indications of treatment，Sun's ureterorenosop is used for the treatment of impacted upper ureteral calculi，which is safe and feasible.The effect of the lithotripsy is accurate，and it can reduce the trauma of the patients and shorten the time of hospitalization.

Key words: Sun's ureterorenosop, retroperitoneal laparoscopic ureterolithotomy, impacted upper ureteral calculi, stone clearance