Objective To investigate the value of highresolution 3T MRI in the detection of 〖JP3〗triangular fibrocartilage complex (TFCC) injuries through a diagnostic test. Methods A retrospective case series analysis was performed in 133 patients with ulnar wrist pain admitted in Beijing Jishuitan Hospital from January 2013 to April 2018. There were 68 males and 65 females, aged 1469 years (mean 32.6 years).The patients was examined with the wrist MRI with consistent parameters and then received wrist arthroscopic detection or treatment. The TFCC injuries were classified as central injury, namely triangular fibrocartilage disc injury and peripheral injury, namely the tear of ulnar attachment, radial attachment, distal radioulnar ligaments and ulnocarpal ligaments. Take the results of wrist arthroscopy as the gold standard, the MRI and arthroscopic findings were compared and the sensitivity, specificity, positive/negative predictive value and positive/negative likelihood ratio were determined.  Results Wrist arthroscopy confirmed TFCC injuries in 122 patients,among which 72 patients were with central injury and 102 with peripheral injury. Meanwhile, TFCC injuries were diagnosed with MRI in 124 patients, among which 75 patients were central injury and111 cases were peripheral injury. As for central injury, the sensitivity/specificity, positive/negative predictive value and positive/negative likelihood ratio of MRI were 0972/0.918, 0.933/0.966 and 11.85/0.03, respectively; when the target pathology was peripheral injury, the sensitivity/specificity, positive/negative predictive value and positive/negative likelihood ratio of MRI were 0.882/0.323, 0811/0.45 and 1.30/0.37, respectively.  Conclusions High-resolution 3T MRI is accurate in detection of central injury of TFCC, no matter the injury is traumatic or degenerated. In the diagnosis of peripheral injury of the TFCC, MRI can provide some help for its high sensitivity. However, the positive findings of MRI on peripheral structures should be cautious because of the poor specificity, and hence the results of history, physical examination and MRI should be considered together to attain an accurate diagnosis.