Experimental　study　on　pressure　drop　characteristics　of　supercritical　water　fixed　bed　and　fluidized　bed　was　conducted　with　a　pressure　range　of　23~27　MPa　and　a　temperature　range　of　360-420°C.　The　results　show　that　the　Ergun　formula　for　calculating　fixed　bed　pressure　drop　can　still　be　applied　in　supercritical　water　conditions　and　the　average　deviation　between　calculation　and　experiment　results　was　13.3%.　A　prediction　correlation　for　minimum　fluidization　velocity　in　supercritical　water　fluidized　bed　was　obtained　based　on　the　experimental　results　of　a　fixed　bed　and　fluidized　bed　pressure　drop　characteristics.　The　average　error　between　the　correlation　calculation　and　experiment　results　was　about　3.1%.　This　study　provides　the　useful　results　for　parameters　design　and　operation　of　supercritical　water　fluidized　bed　reactor.