[Abstract] Objective To introduce a combined operation for treating peroneal tendon dislocation and to evaluate the clinical outcomes of patients. Methods From July 2013 to June 2019, 51 cases of peroneal tendon dislocationwere treated in our hospital. 43 cases were included in the study. Among them, 22 cases underwent modified fibular groove deepening combined with reconstruction of SPR，which served as the improved group; 21 patients underwent fibular groove deepening combined with reconstruction of SPR ,which served as the control group. Compared the operation time, intraoperative blood loss, hospital stay, perioperative complications, VAS score, AOFAS score, ankle dorsi extension-plantar flexion range of motion (ROM ). Results There was no significant difference in operation time, intraoperative blood loss, hospital stay,and perioperative complications between the two groups (P>0.05). The ROM of the modified group at 3 months after operation was significantly better than that of the control group, the difference was statistically significant (P<0.01); the ROM of the modified group at 6 months after surgery and the last follow-up were better than the control group, and the difference was statistically significant (P <0.05). The VAS score and AOFAS score of the modified group 3 months after operation were significantly better than those of the control group, the difference was statistically significant (P<0.01). The VAS score and AOFAS score of the modified group at the last follow-up were better than those of the control group, and the difference was statistically significant (P<0.05). Conclusion Compared with the fibular groove deepening，the modified fibular groove deepening does not increase the operation time, intraoperative blood loss, hospital stay，perioperative complications, and has better effects, rapid recovery, which is worthy of promotion.