In　order　to　rapidly　analyze　the　accuracy　degradation　of　slide-guideway　of　CNC　machine　tool,　this　research　uses　accelerated　degradation　test　to　analyze　the　accuracy　degradation　of　slide-guideway.　This　paper　calculates　the　wear　of　guideway　by　using　Archard　equation.　Based　on　the　theoretical　wear　model,　this　paper　simulates　the　accelerated　wear　degradation　test　of　slide-guideway　and　demonstrates　the　wear　curves.　Geometric　errors　of　slide　which　caused　by　the　wear　of　guideway　can　be　calculated　by　the　wear　carves.　From　the　perspective　of　wear　mechanism,　this　research　provides　an　effective　way　to　analyze　accuracy　degradation　of　slide-guideway.