In　this　paper,　the　flow　fields　of　three　types　of　nozzles　(Hartmann,　Laval　and　Laminar　nozzles)　under　the　same　conditions　are　simulated,　and　the　corresponding　to　pressure,　temperature,　velocity　and　turbulence　intensity　are　obtained.　The　results　suggest　that　two　crushing　presents　in　the　atomization　process　using　Hartmann　nozzle,　but　only　one　crushing　presents　in　the　atomization　process　using　the　other　nozzles,　through　the　comparative　research　on　the　flow　field　features　of　three　types　of　nozzle.　Furthermore,　the　shockwave　plays　a　more　important　role　in　crushing　of　liquid　metal　than　velocity.　Copyright:　©　2013　Editorial　Board　of　CHINA　WELDING.