Yuanyuan Ding,1 Hongxi Li,1 Peng Yao,1 Tao Hong,1 Rongjie Zhao,2 Guangyi Zhao3 1Department of Pain Management, Shengjing Hospital of China Medical University, Shenyang, China; 2Class 5 of 2020 Session, Shenyang No. 20 High School, Shenyang, China; 3Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China Background: Sacroiliac joint pain (SIJP) is an important cause of low back pain and seriously affects the patients’ quality of life. Therefore, it is urgent to find effective treatment methods. Objective: To observe the efficacy of intra-articular (IA) conventional radiofrequency (CRF) and pulsed radiofrequency (PRF) treatment of Sacroiliac joint syndrome (SIJS) under computed tomography (CT) guidance. Study design: Retrospective comparative study. Setting: Shengjing Hospital of China Medical University. Patients and methods: Sixty-four patients with SIJS were enrolled in the Pain management. Patients were randomized into two groups: CRF (CRF group, n=32) and PRF (PRF group, n=32). At each observation time, the general condition, visual analog scale (VAS), the total efficiency rate, Oswestry disability index (ODI), and 36-item short-form health survey were followed up. Results: Compared to the pretreatment value, the VAS and the ODI decreased in both groups after treatment (P