A new absorber combining an impact damper coupled with nonlinear energy sink (NES)was proposed, and its vibration attenuation efficiency was investigated by numerical simulations. The influences of absorber parameters on the amplitude of main structure,energy dissipating and vibration frequency were analyzed. It was demonstrated that this coupled system possesses high absorbing performance even in a wide range of initial input energy,and an appropriate clearance or a large restitution coefficient ca increases the number of collision and dissipate more energy at each collision. Moreover,strong nonlinear stiffness is in favor of enhancing vibration absorption.