To　reduce　the　vibration　of　a　ship＇s　high-temperature　pipeline,　a　long　coated　damping　structure　(LCDS)　with　entangled　metallic　wire　material　(EMWM)　is　proposed　in　this　paper.　The　structural　analysis　of　the　long　coated　damping　structure　for　pipelines　is　carried　out.　The　theoretical　analysis　indicates　that　increasing　the　thickness　of　the　damping　layer　in　a　particular　range　can　improve　the　vibration　attenuation　effect　of　an　LCDS.　Additionally,　experimental　verification　confirms　this　analysis　after　an　experimental　system　for　pipelines.　From　the　results,　it　is　observed　that　increasing　the　thickness　of　the　coated　layer　can　effectively　improve　the　damping　property　of　LCDS　to　a　certain　extent.　The　change　of　the　coated　length　and　the　temperature　has　little　effect　on　the　vibration　attenuation　effect　of　an　LCDS,　indicating　that　the　LCDS　can　work　well　in　a　high-temperature　environment.