Objective To investigate the efficacy of olecranon "V" osteotomy double-column fixation in treatment of humeral condylar fracture．Methods We gave surgical treatment to adult humeral condylar fracture in 18 cases， including 12 males and 6 females，aged 14-60 years， mean 40 years old，from March 2005 to June 2011 in The First People’s Hospital of Yunnan Province．AO/LASIF types analysis showed that A type in 2 cases， B type in 7 cases，C type in 9 cases．After brachial plexus and basal anesthesia，patients were given olecranon "V" osteotomy and exterior and interior plate fixation from outer margin of elbow approach．Patients were guided to functional training，and the regular follow-up was given to understand fracture healing．The elbow function was evaluated by Cassebaum system．Results All 18 patients with humeral condylar fracture and olecranon "V" osteotomy ere healed. The therapeutic effect was excellent in 12 cases， good in 4 cases and general I 2 cases，and the excellent and good rate was 88.9%．Conclusion For humeral condylar fractures，olecranon "V" osteotomy from outer margin of elbow approach，open reduction and double-column plate fixation may prevent bone conglutination，and restore elbow function，so it is an ideal operation way.