In　the　present　work,　a　shock　absorber　structure　suitable　for　the　narrow　space　was　designed,　and　the　vibration　reduction　characteristics　of　metal　rubber/silicone　rubber　(MR　-SR)　composite　material　was　evaluated　in　depth　based　on　a　sine　sweep　test.　Through　comparison,　it　was　found　that　the　structures　with　different　components　possess　unique　mechanical　properties.　Among　them,　the　pure　metal　rubber　damping　structure　has　excellent　energy　dissipation　characteristics,　while　the　MS　-　SR　composite　damping　structure　has　a　lower　resonance　frequency　due　to　the　interface　friction　between　different　materials.　In　addition,　the　single-factor　control　tests　(core　density,　excitation　force,　and　preload)　were　carried　out　for　the　MR　-　SR　composite　damping　structure.　It　was　found　that　increasing　the　density　or　preload　would　strengthen　the　stiffness　of　the　product,　resulting　in　the　increase　of　the　resonance　frequency　and　resonance　amplification　factor,　but　the　decrease　of　the　loss　factor.　All　these　conclusions　were　validated　at　the　microscale.　According　to　the　phenomenon　of　stiffness　softening,　damping　strengthening　and　bending　jump　with　positive　and　negative　sweep　frequency,　the　composite　damping　structure　was　proved　to　possess　variable　stiffness　and　damping　characteristics　and　high　order　nonlinear　stiffness　characteristics.　This　study　provides　effective　guidance　for　the　design　of　materials　and　structures　with　excellent　damping　properties.　©　2022　Chinese　Vibration　Engineering　Society.　All　rights　reserved.