Abstract: [Objective] To report the effect of self-made modified positioner by arthroscopic technique of coracoclavicular reconstruction in the patients for coracoclavicular ligament injury. [Methods] Between April 2019 and December 2019, 15 patients with coracoclavicular ligament injury underwent arthroscopic coracoclavicular reconstruction by Endobutton system in our department. Of them, including 11 males and 4 females with average age of (30.50±5.45) years. All the 15 patients received arthroscopic coracoclavicular reconstruction of improved Endobutton combined with anchors. [Results] The 15 patients were followed up for 4 to 9 months, with an average of (6.70±1.10) months. Bases on the ASES, Constant-Murley score and UCLA shoulder score, 14 patients were graded as excellent and 1 as good with overall excellent and good rate of 100%. [Conclusion] The self-made modified positioner is safe and convenient in the treatment of coracoclavicular ligament injury, with accurate tunnel position, less postoperative tunnel expansion, loss of reduction and safety, rapid recovery, less limited to glenohumeral joint mobility.