Abstract: Aiming at the problems of difficult processing of alumina ceramics and poor surface quality， laser-assisted heating grinding was studied. According to the thermophysical performance parameters of alumina ceramics， the laser-assisted heating grinding mechanism was analyzed， a laser-assisted heating grinding experimental system was built， laser-assisted heating grinding and conventional grinding experiments were performed. The scanning electron microscopy(SEM) and laser confocal analysis were used to analyze the processed workpiece surfaces. The results showed that alumina ceramics can change the material removal method and make the ceramic brittle removal into plastic removal by using the laser-assisted heating grinding. Compared with conventional grinding， the morphology of the processed surface has less brittle fracture， lower surface roughness value， better surface quality and longer service life of the grinding wheel.

Key words: laser-assisted grinding, alumina ceramics, plastic removal, surface quality；brittle fracture