Objective: To observe the effect of different length of double J ureteral stent (double J tube) on the quality of life of patients after ureteroscopy. Methods: Patients who underwent unilateral ureteroscope surgery with double J tubes in our hospital from September 2017 to February 2018 were selected as study objects, and all patients were randomly divided into a control group and an observation group. In the control group (n=60), single length F5 double J tube was retained after surgery. The observation group (n=60) obtained the length of ureter and the corresponding length of F5 double J tube by CT urography. At week 1 and 4 after operation, patients received the Bristol ureteral stent symptom questionnaire, to record and compare the Ureteric Stent Symptom Questionnaire (USSQ) scores and double J tube crossing the midline. Results: The urinary symptoms, physical pain symptoms, health status and other questions in the observation group were better than those in the control group at week 1 and 4 after surgery, and the differences between the groups were statistically significant (P<0.05). There was no difference between the two groups (P>0.05). Conclusion: Preoperative selection of double J tube with appropriate length can significantly reduce complications and improve patients’ quality of life.