Aiming　at　the　vibration　reduction　problems　of　pipeline　systems　under　high　temperature,　a　high　temperature　mechanics　model　of　the　metal　rubber　coated　damping　structure　of　the　pipelines　was　established　by　equivalent　linearization　method.　The　model　was　used　for　analyzing　the　stiffness　and　response　amplitude　of　metal　rubber　treated　with　different　temperatures.　The　thermal-vibration　joint　test　system　of　the　pipelines　was　set　up　firstly.　Then　the　damping　performance　of　the　coated　damping　structure　of　the　pipelines　was　verified　with　different　ambient　temperatures　and　metal　rubber　densities,　where　the　insertion　loss　was　taken　as　the　evaluation　index.　The　results　show　that　reducing　the　density　of　metal　rubber　may　effectively　increase　the　vibration　attenuation　effectiveness　of　the　pipelines.　At　the　same　time,　the　effect　of　the　ambient　temperature　on　the　metal　rubber　coated　damping　structure　is　negligible,　indicating　that　the　coated　damping　structure　may　work　well　in　a　high　temperature　environment.　©　2022,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.