Common　studies　on　entangled　metallic　wire　material　(EMWM)　lack　exploration　of　the　material’s　electrical　conductivity.　This　paper　focuses　on　the　dynamic　mechanical　properties,　electrical　conductivity　and　fatigue　properties　of　Beryllium　bronze　alloy　wrapped　wire　material　(QBe2-EMWM)　with　excellent　electrical　conductivity.　Three　batches　of　304-EMWM　and　QBe2-EMWM　with　different　densities　are　tested　under　cyclic　dynamic　loading,　and　average　dynamic　stiffness,　loss　factor,　and　resistance　are　calculated.　The　experimental　results　show　that　the　dynamic　mechanical　properties　and　electrical　conductivity　of　EMWM　are　significantly　affected　by　the　density　of　EMWM.　The　loss　factor　of　EMWM　increases　with　the　increase　of　excitation　frequency　and　excitation　amplitude,　while　the　average　dynamic　stiffness　is　the　opposite.　The　resistance　of　QBe2-EMWM　is　only　5%　of　that　of　304-EMWM.　Furthermore,　an　EMWM　fatigue　life　assessment　method　based　on　damage　factors　is　proposed.　The　fatigue　life　of　EMWM　is　determined　by　considering　the　damage　trend　of　average　dynamic　stiffness,　loss　factor,　and　resistance.　The　stiffness　and　resistance　of　EMWM　increase　with　the　increase　of　excitation　times,　while　the　loss　factor　is　the　opposite.　When　the　number　of　excitations　reaches　a　certain　value,　the　mechanical　and　electrical　indexes　of　EMWM　is　regionally　stable.　SEM　observations　show　that　the　failure　modes　of　304-EMWM　are　frictional　wear　and　friction　debris,　while　the　failure　modes　of　QBe2-EMWM　are　indentation,　friction　debris,　frictional　wear,　and　fracture.　The　cumulative　damage　model　is　established,　and　the　rationality　of　the　model　is　verified　by　experimental　data.　©　ASM　International　2024.