The　composite　blocks　of　polyetheretherketone　(PEEK)　filled　with　different　content　of　calcium　carbonate　(CaCO3)　whisker　and　PTFE　were　prepared　by　compression　molding.　The　friction　and　wear　performance　of　PEEK　composites　were　investigated　under　dry　sliding　condition　against　carbon　steel　on　MM200　block-on-ring　apparatus　and　compared　with　that　of　pure　PEEK.　The　results　show　that　the　friction　performance,　wear　resistance　and　limiting　pressure-velocity　(PV)　value　of　PEEK　composites　are　superior　to　that　of　pure　PEEK.　Inclusion　of　CaCO3　and　PTFE　significantly　reduces　the　friction　coefficient　of　composites　by　2　times　with　excellent　stability　and　the　specific　wear　rate　by　27　times　to　PEEK.　CaCO3　whisker　contributes　to　abate　scuffing,　adhesion　and　plastic　deformation　of　the　filled　composites,　while　a　thin,　uniform　and　tenacious　transfer　film　formed　on　the　surface　of　steel　ring　due　to　inclusion　of　PTFE,　which　conforms　to　the　better　tribological　behaviors　of　composites.　The　wear　of　filled　PEEK　composites　consists　of　two　major　wear　mechanisms　viz.　slight　adhesion　and　fatigue.