Achievement　of　laser　close-piercing　lapping　processing　technique　for　damage-free　cutting　in　arbitrary　path　(line,　curve　and　angle)　of　dense　Al2O3　ceramics　with　the　thickness　of　10~12　mm　by　CO2　laser　is　proposed.　By　the　combination　analysis　of　scan　electron　microscope　(SEM)　and　laser　scanning　confocal　microscope　on　the　cut　surface,　the　good　cut　quality　is　concluded.　Based　on　the　CCD　analysis　of　the　novel　cutting　processing,　the　optimal　process　parameters　for　damage-free　cutting　of　10　mm　thick　Al2O3　ceramics　including　peak　power　of　2.7~3.5　kW,　pulse　frequency　of　about　50　Hz,　cycle　duty　of　30%~50%　and　piercing　time　of　0.1~0.5　s,　are　obtained.　The　optimal　line　cutting　speed　can　be　15~20　mm/min.