Blasting　action　plays　a　very　important　role　in　slope　stability　and　the　effect　of　rock　fragmentation　in　stonework　cutting　excavation.　Based　on　engineering　practices,　this　paper　applies　dynamic　finite　element　method　and　conducts　a　numerical　simulation　of　the　cutting　excavation　process.　It　have　conducted　researches　on　the　stress　field　inside　rocks　in　millisecond　delay　blasting,　Von-Mises　and　other　domino　effects,　as　well　as　the　propagation　rules　for　particle　vibration　velocity.　Results　show　that　based　on　the　numerical　simulation　of　the　engineering　practice,　this　paper　largely　represents　the　real　physical　mechanical　process　of　the　rock　fragmentation　and　can　hence　serve　as　a　guide　for　both　design　and　conduction　of　cutting　blasting.　©2010　IEEE.