[Objective] To introduce the surgical technique and clinical efficacy of arthroscopic anchor placement at 6 o'clock position for anterior shoulder instability. [Methods] From January 1, 2018 to January 1, 2021, 51 adult patients underwent arthroscopic posterior Remplissage procedure and anterior Bankart repair for shoulder dislocation by using four- approach technique. The anterosuperior ap- proach should be as upward as possible, whereas the anteroinferior approach should be tested with hemostatic forceps to confirm if it can reach the 6 o 'clock position and the two approaches should not be too close. The anteriorly labial complex was released to 6 or even 7 o 'clock position, and 5mm cartilage was removed from the anteroinferior glenoid edge. As anchors placed, including the one at 6 o'clock posi- tion, the labrum complex was reduced and repaired in full thickness as possible. [Results] All patients were successfully operated on with- out serious intraoperative complications and were followed up for 12 to 24 months. No shoulder dislocation occurred again in any of the pa- tients. At last follow-up ASES score, Constant-Murley score and Rowe were significantly improved compared with those before operation (P＜0.05) . Postoperative routine three-dimensional CT showed that the anchor position was good. [Conclusion] Arthroscopic anchor place- ment at 6 o 'clock position for repair of labrum complex is effective treatment of glenohumeral instability, which depends on the precise pre- operative selection of indications and the proficiency of the operation technique under the arthroscope.