[Objective] To compare the mechanical properties of three kinds of internal fixation for femoral intertrochanteric fractures with lateral wall fracture. [Methods] The CT images of femur were obtained from a volunteer and processed by MIMICS14.0, Geomagic Stu- dio, CERO3.0, Hypermesh13.0 software to create the models of proximal femoral nail anti- rotation (PFNA) , PFNA enhanced by tension band and locking plate as internal fixation fore femoral intertrochanteric fractures with ruptured lateral wall respectively. The Von Mises stress and displacement of the implant and fractures were analyzed by using Abaqus6.12. [Results] All the Von Mises stresses of the three internal fixation modes were in descending order as the neck-trunk junction ＞ femoral head ＞ fracture site, with statistically significant dif- ferences (P＜0.05) . The Von Mises stress in femoral head was in descending order as PFNA ＞ PFNA-tension band ＞ locking plate with a statistically significant difference among them (P＜0.05) , whereas which proved not significantly different in the fracture site among the three groups (P＞0.05) , and were significantly ranked up-down in neck- trunk junction as PFNA ＞ Locking plate ＞ PFNA-tension band (P＜0.05) . Conversely, displacements of fracture ends were significantly arranged down- up in order of PNFA- tension band ＜ locking plate ＜ PFNA (P＜0.05) . [Conclusion] PFNA enhanced by tension band fixation does reduce the stress and displacement of femoral inter- trochanteric fracture complicated with lateral wall fracture, which is beneficial to the stability of fracture ends.