Based　on　Hertz　contact　theory,　contact　area　parameters　between　ball　and　raceway　are　calculated.　Using　the　Creep　theory　of　Cater　and　V-J　theory,　adhesive　area　and　micro-slip　area　in　the　contact　area　are　analyzed.　It　is　considered　that　micro-adhesion　wear　of　micro　convex　body　in　the　slip　area　is　the　main　reason　for　accuracy　degradation　of　a　linear　ball　guide　pair.　And,　the　characteristics　of　the　contact　area　between　ball　and　raceway　of　slider　are　characterized　using　the　fractal　function.　Fractal　parameters　are　obtained　using　the　least　squares　fitting　double　logarithmic　graph　structure　function.　Considering　the　lubrication　condition　between　the　ball　and　rail　of　slider,　stress　analysis　is　carried　out　on　the　adhesive　area.　A　fractal-creep　model　of　contact　surfaces　is　established　in　the　micro-slip　region.　The　fractal　parameters　of　a　certain　guide　rail　are　measured,　and　the　wear　degradation　process　of　linear　rolling　guide　is　simulated.　Finally,　the　relationship　between　wear　and　relative　tangential　velocity,　normal　load　and　running　mileage　of　linear　ball　guide　is　obtained.　Copyright　©　by　HIGH　TECHNOLOGY　LETTERS　PRESS.