Abstract: Objective:To discuss the application of LCP（The locked screw only penetrates one side cortical bone） in treatment of type AO41-C fracture.Methods: From January,2003 to December,2005,we treated 36 patients who were diagnosed C-type fracture of tibial plateau according to AO principle.Among those patients,17 persons were type C1,14 persons were type C2 and 5 persons were type C3.They were all treated with double anatomic plates.Between two plates,one was locking compression plate at least.Except 2 open fracture cases who were performed the operation via one approach,the others were all performed operation via two approaches.Results: After operation,all patients were followed up.The time of follow-up was between 8 to 30 months.According to the principle of Merchant’s evaluation,the rate of excellence and good was 89%.The range of knee motion of the patients was more than 90 degree.Among them,11 cases were from 90 to 120 degree and the others were more than 120 degree.Conclusions: it will reduce the injury of soft tissue,be smoother to surface of articulation and supply a more strong stabilization by using LCP to treat type AO41-C fracture via two approaches.