Objective:To study and sum up the experience of diagnosis and treatment of ureter obstruct by Simplification ureteroscope.Methods:the patients of 750 cases for ureterolith underwent ureteroscopic lithotomy and pressune orbit lithotripsy by using caudal anesthesia in outpatient the 11 cases ureterostensis were treated by watery capus expand,ureteroscopic hard expand and ureterotectomy by using of self-made electrode.Then,transurethral electro incisions of ureterocles were carried out for 2 patients.Results:Successful rate of ureteroscopic lithotomy is 98.4%;12 patient of upper ureter stone received ESWL because of stone entering the renal pelvis,and 3 cases complicated ureteral perforation;11 cases ureterostensis and 7 cases ureterocele were cured.Conclusions:It is frist chosen for ureteroscope to ureteral stone,ureteral stricture,and ureteroceles with a diameter of ≤3cm,and the method have ideal cure effect and the patients will receive.