Objective To investigate the diagnosis and treatment strategy of urosepsis caused by ureteral calculi in solitary kidney. Methods The clinical data of patients with urosepsis caused by ureteral calculi in solitary kidney in the Department of Urology of Chengdu 363 Hospital Affiliated to Southwest Medical University from March 2015 to March 2020 were analyzed retrospectively. Results A total of 23 patients were included. One patient received ureteroscopic holmium laser lithotripsy, after which urosepsis and renal function deteriorated, then got better after anti-infection and hemodialysis treatment in intensive care unit; 17 patients received implantation of ureteral stent by cystoscopy, and 5 patients received percutaneous nephrostomy by ultrasound guiding, the 22 patients received ureteroscopic lithotripsy or flexible ureteroscopic lithotripsy electively. One patients had subcapsular renal hematoma postoperatively and worse renal insufficiency, the rest 22 patients had improved renal function. All patients were cured clinically. Conclusions For solitary kidney patients who have urosepsis caused by ureteral calculi, emergency treatment is necessary. The relief of urinary obstruction must be based on effective anti-infection. Choosing cystoscopic ureteral stent implantation or percutaneous nephrostomy depends on patients’ individualization. Ureterscopic lithotripsy simultaneously is not recommended. Ureteral intubation before cystoscopic ureteral stent implantation is important, which can increase the success rate of ureteral stent implantation.