Silicon　nitride　ceramics　are　widely　used　in　various　industrial　fields　because　of　their　excellent　characteristics:　high　hardness,　high　elastic　modulus,　abrasion　resistance,　and　high　heat　resistance.　Diamond　wheel　grinding　is　the　predominant　and　most　productive　method　to　machine　silicon　nitride　ceramics.　However,　a　lot　of　heat　is　generated　due　to　high　friction　between　a　diamond　grinding　wheel　and　extremely　rigid　silicon　nitride　during　grinding.　This　causes　surface/subsurface　damage,　wheel　wear,　etc.,　which　impairs　the　surface　quality　of　silicon　nitride.　This　impairment　can　restrict　the　use　of　silicon　nitride　ceramic　components.　To　improve　the　surface　quality　and　service　life　of　grinding　wheels,　a　laser　macro-micro　combination　structured　grinding　(LMMCSG)　method　was　presented.　The　results　indicated　that　the　grinding　force　ratio　and　surface　roughness　when　using　LMMCSG　were　respectively　31%　and　40%　lower　than　the　grinding　force　ratio　and　surface　roughness　when　using　conventional　grinding.　Moreover,　the　LMMCSG　method　effectively　reduced　the　wheel　wear　and　workpiece　subsurface　damage.