Objective To investigate the loading ability of improved U shaped plate. Methods To understand the bending and distorting ability of U shaped plate by experimental test of mechanics and to verify its theoretical calculation as well as comparison with general plate, AO plate and dynamic compression plate. Results The bending ability and the distorting ability of general plate adding a simple U shaped arm can be raised respectively by 22～37 percent and 50～105 percent. Compared with the same usage of AO plate and dynamic compression plate at sagittal face, the bending ability can also be raised respectively by 107.6 percent and 21.5 percent, and the distorting ability raised respectively by 406 percent and 58 percent of raised by 31.9 percent of distorting ability compare with CP DCP Conclusion U shaped bone plate is an eligible plate with enough strength, simple structure and less materials.