The　possibility　of　using　nanosecond　pulsed　laser　ablation　of　aluminium　matrix　composite　reinforced　with　SiC　ceramic　particles　under　the　assistance　of　high　pressure　gas　is　investigated.　The　results　indicate　that　the　ablation　depth　increases　with　the　increase　of　pulse　energy.　It　is　very　difficult　to　find　the　isolate　SiC　particle　on　the　ablated　surface　due　to　the　occurrence　of　complicated　metallurgical　reaction　during　the　ablation　process.　The　Al,　Si,　C,　and　O　elements　within　the　re-solidified　layers　have　a　relatively　uniform　distribution,　and　the　thickness　and　surface　roughness　of　the　re-solidified　layers　increase　with　the　increase　of　pulse　energy,　which　presents　a　tendency　of　saturation.　The　mechanical　action　of　high　pressure　co-axial　gas　is　the　key　mechanism　of　material　removal.　©　2017,　Chinese　Lasers　Press.　All　right　reserved.