Objective To explore the clinical effect of modified Broström method combined with suture anchors in the treatment of obsolete lateral ankle ligament injury. Methods Thirty patients with obsolete lateral ankle ligament injury treated between February 2013 and August 2016 were selected. All the patients were treated with Broström method combined with suture anchors. The clinical effect was evaluated by comparing the visual analogue scale(VAS),anterior talar translation (ATT), the inclination angle of the talus and the American Orthopedic Foot and Ankle Society(AOFAS) scores preoperatively and six months postoperatively. Results All the patients were followed up for 6~24 months. VAS scores were (7.63±1.31)preoperatively and (2.23±1.22) six months postoperatively. ATT was (10.62±2.24)preoperatively and (3.21±1.12) mmsix months after operation). The inclination angle of the talus was (11.45°±2.64°)preoperatively,compared with(4.32°±1.21°) six months after operation.AOFAS scores were (64.98±6.07) preoperatively and (92.08±3.22) six months postoperatively.The ankle function rating was excellent in 20 cases, good in 8 cases, so the excellent rate was 93.33%. Conclusions The modified Broström method combined with suture anchors is an effective method for treating obsolete lateral ankle ligament injury, characterized by simple operation, less trauma, satisfactory efficacy and good safety.