Abstract: [Abstract] Objective：To compare the clinical efficacy of olecranon osteotomy and trochanter lingual petal approach in treatment of adult AOC humerus fractures.Methods：70 cases of adult AOC humerus fractures patients were divided into two groups by random number table method（n=35）.Group Ⅰ was treated with olecranon osteotomy approach fixation，and group Ⅱ was treated with triceps by passage into the tongueshaped flap fixation.Then compared the incidence of postoperative complications，elbow joint function recovery situation and so on.Results：There was no significant difference between the two groups in operation time，blood loss，fracture healing time and hospitalization time（P>0.05）.After operation 1 year，the elbow joint function recovery rate was 88.57% in group Ⅰ，which was significantly higher than 60.00% in group Ⅱ（P<0.05）.The total complication rate was 17.14% in group Ⅰ and 20.00% in group Ⅱ，there was no significant difference between the two groups（P>0.05）.Conclusion：The two approaches can be used to treat AOC humeral fractures with satisfactory results.However，the elbow joint function of AOC humerus fracture treated by olecranon osteotomy approach is better.

Key words: humerus fractures, AOC type, triceps tongue flap, olecranon osteotomy