Metal　rubber　is　a　kind　of　cumulative　damage　material,　because　it　has　formed　a　very　complex　spatial　network　structure,　the　metal　wires　occlude　each　other,　extrusion,　sliding　friction.　In　addition　to　the　internal　wire,　the　metal　rubber　seal　has　an　outer　covering,　so　the　conventional　metal　fatigue　theory　can　not　be　applied.　In　this　paper,　energy　consumption　ΔW,　loss　factor　η　and　damage　factor　D　were　selected　as　fatigue　damage　evaluation　indexes,　and　fatigue　life　test　of　O-shaped　metal　rubber　seal　with　large　ring　diameter　ratio　was　carried　out　through　fatigue　damage　test.　The　effects　of　loading　amplitude,　excitation　frequency　and　porosity　on　fatigue　life　and　wear　of　metal　rubber　were　studied　by　control　variable　method.　The　results　showed　that　the　hysteresis　loop　of　the　metal　rubber　seal　was　obviously　＇willow　leaf＇,　and　the　energy　consumption　capacity　decreased　before　150　000　vibration　cycles.　The　stiffness　of　metal　rubber　seal　increased　with　the　decrease　of　porosity,　and　the　fatigue　damage　of　test　sample　increased　with　the　decrease　of　porosity.　The　increase　of　loading　amplitude　aggravated　the　fatigue　wear　of　metal　rubber　seals　in　varying　degrees.　This　study　provided　data　on　fatigue　life　performance　research　of　O-shaped　metal　rubber　seals,　and　also　certain　reference　for　the　prediction　of　fatigue　life　of　metal　rubber　seals　in　practical　engineering　applications.　Copyright　©2021　Tribology.　All　rights　reserved.