In order to provide the scientific bats for clinical application, we analysed thebiomechanic of self-designed multi-function femoral plate(MFFP) on unstable intertrochantericfracture of femur. Methods: Four sensitive load cell were laid on the medial and lateral of proximalfemurs of twelve fresh cadaver to analyse the stress and strength. Results: The results showed thatMFFP system can lower the stress of femoral calcar and increase the stability of fracture, while thedynamic hip screw(DHS), slide hip screw and dynamic condyle screw(DCS) increase the stress offermoral calcar and lower the stability of fracture. The results also showed that inherent stress andstrength of the MFFP system can improve and suit the mechanical environment of bonere-establishement and intention of the instability of proximal femoral fracture. Conclusions: TheMFFP system has the follwing advantages, namely propel design with reliable biomechanicalperfomance, possesses more effctive ability of anti-rotation, three-dimensional fixation and easy tohandle. Therefore, it is worth popularization.