The dynamic pylon assembly composed of 2 member cylinders preferably co-aligned and upper cylinder being mounted on the lower cylinder. The two member cylinders being interposed with a spring in-between them. The rectangular wire die spring absorbs the energy when weight being applied to the pylon assembly and release the same in late stance phase of the gait. The dynamic pylon assembly allows for the controlled transverse rotation by the help of an outer silicon liner. The dynamic pylon assembly is extremely modular and is readily attached to the different prosthetic foots and is readily received by the prosthetic socket. Thus the entire mechanism being extremely modular simulates the normal human locomotion and ease the rhythm of the gait.