Aiming　at　the　problem　of　unclear　interface　connection　performance　of　the　sandwich　structure　with　the　core　of　elastic　damping　spiral　wire　mesh,　two　typical　connection　processes　of　vacuum　brazing　and　cementing　were　adopted.　The　physical　interface　bonding　mechanism　and　mechanical　properties　of　the　sandwich　structure　have　been　studied　in-depth　through　compression　and　shear　tests　and　microscopic　characterizations　such　as　SEM　and　EDS.　The　results　show　that　the　interface　characteristics　by　brazing　process　are　uniform　and　continuous　rather　than　that　by　cementing　process.　The　brazing　interface　of　the　sandwich　panel　has　formed　a　good　metallurgical　bond,　i.e.,　the　Ni　and　Si　elements　in　the　brazing　filler　metal　diffuse　obviously　with　the　Fe　and　Cr　elements　in　the　panel　and　core　material.　The　highest　loss　factors　of　the　brazed　sandwich　panel　and　the　cemented　sandwich　panel　under　the　static　compression　load　can　reach　0.194　and　0.128,　respectively.　This　means　that　the　sandwich　panel　with　metal　spiral　mesh　has　a　large　energy　dissipation　capacity.　The　peak　loads　of　tensile　shear　test　for　the　brazed　cemented　sandwich　panels　are　up　to　2　589　N　and　1　302　N,　respectively.　The　peak　load　of　the　former　increases　with　the　increase　of　the　core　material　density,　while　the　latter　is　the　opposite.　The　failure　mode　of　the　brazed　sandwich　panel　in　the　tensile　shear　experiment　is　peeling　of　the　panel　and　the　core　material,　while　the　cemented　sandwich　panel　mainly　occurs　crack　propagation　and　fracture　of　core　material.　This　research　provides　a　theoretical　and　application　guideline　for　the　connection　and　mechanical　performance　analysis　of　porous　metallic　sandwich　structures.　Copyright　©2022　Acta　Materiae　Compositae　Sinica.　All　rights　reserved.