To　analyze　the　wear　mechanism　of　the　slide-guideway,　the　deformation　model　is　established　under　actual　machining　condition　and　the　reaction　pressure　of　slide-guideway　contact　surfaces　can　be　calculated　by　this　model.　This　research　designs　a　scientific　and　rational　accelerated　degradation　wear　test.　The　wear　model　of　slide-guideway　is　built　by　using　Archard　equation.　The　wear　of　guideway　contact　faces　is　the　main　reason　for　the　accuracy　degradation　of　slide-guideway,　this　paper　mainly　establishes　the　guideway　contact　surfaces　wear　model.　Based　on　the　established　analysis　model,　the　wear　curve　of　slide-guideway　in　the　accelerated　wear　degradation　test　is　predicted　under　the　increasing　cutting　forces.　Results　show　that　this　model　can　better　guide　the　parametric　design　of　actual　accelerated　wear　degradation　test　and　can　predict　the　wear　of　bed　rail　under　working　according　to　the　wear　of　experiment　under　high　load.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.