In　this　paper,　the　ultra-precision　mirror　polishing　technology　was　adopted　for　mirror　processing　experimental　study　of　Aluminum　Alloy　mobile　phone　shell.　The　experiments　show　that:　polishing　pressure,　Grinding　disc　speed,　the　texture　and　hardness　of　polishing　pad　and　abrasive　particle　size　are　the　main　factors　to　affect　the　surface　quality.　Through　to　optimize　these　parameters　matching　combination,　can　effectively　improve　the　surface　quality　and　reduce　the　surface　roughness　and　obtain　surface　roughness　is　Ra0.026　mu　m.