目的　髋臼部T形骨折解剖结构较为复杂，损伤机制多种多样，在临床治疗中难以制定统一的手术金标准。本文通过建立有效的髋臼部T形骨折有限元模型，比较四种不同内固定方式的生物力学稳定性之间的差别。  方法　利用有限元建模软件建立髋臼T形骨折模型后,应用相关有限元软件建立双柱逆行拉力螺钉（A）、前柱重建钢板联合后柱拉力螺钉（B）、后柱重建钢板联合前柱拉力螺钉（C）和双柱重建钢板（D）这4种不同内固定术后的模型，分别予以模拟站位和坐位并进行加载分析。   结果　分别在站位、坐位下，在加载方式相同的情况下髋臼T形骨折前后柱骨折线上最大位移及骨折线上节点位移均数表现为A＞B＞C＞D。  结论　应用双柱重建钢板内固定方式治疗髋臼T形骨折具有良好的生物力学稳定性，后柱重建钢板联合前柱拉力螺钉次之。

Objective　The anatomical structure of T-type acetabular fracture is very complex with diverse mechanisms of injury, it's difficult to develop a unified surgical gold standard in the clinical treatment. Through the establishment of an effective T-type acetabular fracture of finite element model, the biomechanical stability difference of four different methods of internal fixation was compared.　Methods　Finite element modeling software was used to build a model of T-type acetabular fracture, and the relevant finite element software was used to establish the following 4 different internal fixation model: retrograde lag screws for two columns (A), the reconstruction plate for anterior column combined with lag screws for posterior column (B), reconstruction plate for posterior column combined with lag screws for anterior column (C) and reconstruction plates for two columns (D). Loading analysis was carried out with the models in a sitting or standing position.　Results　In standing and sitting positions , the maximum displacement and the mean node displacement of anterior and posterior column fracture lines of T-type acetabular fracture were both A＞B＞C＞D.　Conclusion 　Application of double-column reconstruction plate fixation treatment of T-type acetabular fractures has the best biomechanical stability ,followed by reconstruction plate for posterior column combined with lag screws for anterior column.