Tribological　behaviors　of　carbon　fiber　reinforced　polyetheretherketone　(CFR　PEEK)　sliding　against　silicon　carbide　ceramic　under　seawater　lubrication　were　investigated.　The　effects　of　sliding　velocity　(from　0.5　to　1.5　m/s)　and　contact　pressure　(between　0.66　and　2.64　MPa)　on　friction　coefficient　and　wear　rate　have　been　obtained　through　a　surface　contacted　tribo-tester.　The　results　reveal　that　the　friction　pair　possesses　outstanding　friction　and　wear　resistances　under　seawater　lubrication,　and　there　exists　an　evident　running-in　process.　When　contact　pressure　is　beyond　1.32　MPa,　the　friction　coefficient　of　the　friction　pair　is　totally　less　than　0.1,　and　it　firstly　decreases　and　then　fluctuates　slightly　with　the　increase　of　sliding　velocity.　Friction　coefficient　shows　a　downward　trend　with　the　increase　of　contact　pressure　when　the　sliding　speed　keeps　between　0.75　and　1.5　m/s.　The　wear　rate　of　CFR　PEEK　decreases　slightly　with　the　increase　of　contact　pressure,　whereas　the　mass　loss　of　silicon　carbide　ceramic　is　negligible.　The　tribological　mechanism　of　friction　pair　was　analyzed　through　the　micro-morphology　of　worn　surfaces　obtained　by　optical　microscope　and　scanning　electron　microscope.　The　main　tribological　mechanisms　of　CFR　PEEK　are　adhesive　wear　and　mechanical　ploughing　caused　by　surface　micro-peaks　of　silicon　carbide　ceramic.　The　research　will　lay　foundation　for　materials　screening　of　key　friction　pairs　in　seawater　hydraulic　components.