Abstract: Half-cycle friction damping device with negative stiffness characteristic，which only needs to be arranged at the bottom floors to dissipate energy and reduce shock，is proposed in this work. Due to the stable mechanical properties，simple structure，and large stroke of this device，it can be readily applied in engineering. The expected hysteretic model is obtained by the performance test. Shock absorption simulation analysis for single degree of freedom and frame structure is realized in this work. The results indicate that the half-cycle friction damping device can increase structural damping，extend structure cycle and control the seismic response of the structure.