Objective To observe the efficacy and safety of Nemonoxacin Malate capsule in the treatment of peritoneal dialysis-associated catheter infection.Methods Select cases receiving treatment from March 1,2018 to December 31,2021,who had suffered from peritoneal dialysis-associated exit-site infections or tunnel infections and received treatment of Nemonoxacin Malate capsules and regular follow-up in the Peritoneal Dialysis Center of the First Affiliated Hospital of China Medical University.The basic data of patients were collected to record the score of exit-site infection and infection-related indicators.The treatment effect on peritoneal dialysis associated catheter infection in patients taking Nemonoxacin Malate capsules was retrospectively analyzed through a before-and-after self-controlled design.Results A total of 23 patients with peritoneal dialysis-related catheter infection were included,who were treated with Nemonoxacin Malate capsules.Totally 29 episodes of catheter infection occurred in 23 patients,and Staphylococcus aureus was the most predominant pathogen(52.2%).The score of exit-site infection of 21 patients(91.3%)decreased to the normal range after the application of Nemonoxacin Malate capsules,the score of two patients(8.7%)was still not up to the standard after three weeks of treatment with Nemonoxacin Malate capsules,and 23 patients(100%)had a lower score of exit-site infection than before the application of Nemonoxacin Malate capsules.All patients had no serious adverse reactions.Conclusion Nemonoxacin Malate capsule is safe and effective in the treatment of peritoneal dialysis-related catheter infection.