Abstract: Objective To study the therapeutic effect of arthroscopic reduction and internal fixation on glenoid cavity fractureMethods Eight patients with glenoid cavity fracture were treated with arthroscopic reduction and fixation in our hospital from January 2007 to January 2009.The fracture was classified as types I-V in 2,2,1,2 and 1 patients,respectively,according to the modified Idebery classification method.Types II-IV fractures were fixed with hollow screws through the neck of glenoid cavity.Types IV and V fractures were fixed with hollow screws through the neck of glenoid cavity and plates on both borders of scapulaResults The patients were followed up for an averaged time of 31 months（range,21-40 months） after operation.All glenoid cavity fractures were healed with an average healing time of 11 weeks（range,8-12 weeks）.The mean UCLA score was 34（range,31-35）.The excellent and good healing rate was 87.5%Conclusion Arthroscopic reduction and internal fixation is a good procedure for glenoid cavity fracture with the advantages of less traumas,good safety,good reduction,good functional recovery,and less complication.