Abstract:[Objective] To evaluate the clinical outcome of hip arthroscopy for labral amorphous calcification. [Methods] From January 2013 to October 2017, 15 patients who was diagnosed of labral amorphous calcification on images were enrolled in this study, and all re- ceived hip arthroscopy. The clinical and imaging data of the patients were evaluated. [Results] Intraoperatively, arthroscopic examination showed that the calcified lesion of labrum was located at 11-3 clock points in front or above the acetabulum. The lesion volume was signifi- cantly positively related to the preoperative VAS score (P<0.05) , whereas significantly negatively related to the preoperative mHHS and iHOT-12 scores (P<0.05) . Among the 15 patients, 5 case were associated with pincer- type impingement, 2 with cam- type FAI, 5 with mixed FAI, and only 3 were simple labral calcification. The VAS scores significantly decreased (P<0.05) , while the mHHS and iHOT-12 scores significantly increased at 12 and 24 months postoperatively compared with those before surgery (P<0.05) . Radiographically, the α angle and lateral center edge angle (LCEA) significantly reduced (P<0.05) , while the femoral head neck offset (FHNO) significantly in- creased after surgery compared with those preoperatively (P<0.05) . No recurrence of labral calcification, and no obvious hip degeneration were seen in anyone of the 15 patients. [Conclusion] Hip arthroscopy is an effective method for the treatment of labral amorphous calcifica- tion. The size of calcification lesion might be one of the influencing factors of preoperative symptoms and function.