Abstract: [Abstract] Objective：To investigate the effect of deep subfascial noncontact locking plate in treatment of occult infective femoral fracture.Methods：32 patients with occult infective refracture after femoral shaft fracture were analyzed retrospectively.Deep subfascial non contact locking plate fixation combined with cancellous bone granule transplantation was used.The occult infection，postoperative recovery and the difference of blood biochemical indexes of the patients before and after treatment were observed and analyzed.Results：32 cases confirmed the existence of chronic bone infection by pathological examination，21 cases of bacterial culture were positive，all were different types of staphylococcal infection，the postoperative drainage time was 7～14d，the average drainage time was（8.5±3.1）d.The healing time was 15～24w after operation，the average healing time was（17.8±4.3）w.The white blood cell count，erythrocyte sedimentation rate and C reactive protein at 2 months after the operation after fracture healing were significantly lower than those before the treatment（all P<0.05）.The leukocyte count and erythrocyte sedimentation rate did not continue to decrease after 2 months，while C reactive protein continued to decline（P<0.05）.Conclusion：The noncontact locking plate under fascia for the treatment of the infection of the patients after the fracture of the femur is beneficial to control the infection and promote the healing of the fracture.

Key words: occult infection, femoral fracture, re fracture, deep subfascial noncontact locking plate