Actinomyces turicensis is a single-cell prokaryotic microorganism, which is the main oral flora of healthy people. If it enters other parts to cause infection, it may cause actinomycosis. This article introduced a case of tunnel infection of peritoneal dialysis catheter caused by Actinomyces turicensis. The patient was treated with meropenem and cefotaxime, and the disease was improved and the patient was discharged. By introducing the clinical characteristics, laboratory detection and treatment methods of Actinomyces turicensis infection, this study helps clinicians to become more familiar with the diagnosis and treatment of this kind of disease, and emphasizes that the clinical and laboratory should maintain timely and effective clinical communication to achieve early diagnosis and treatment.