HIGEE　(High　Gravity　Rotary　Device)　rotating　oil　purifier　which　consists　of　two　parts:　hydrocyclone　separator　and　rotating　packed　bed　(abbr.　RPB)　is　considered　to　be　capable　of　removing　the　solid　particle　contaminant,　moisture　and　gas　simultaneously.　As　the　major　unit　of　HIGEE,　the　RPB　uses　centrifugal　force　to　intensify　mass　transfer.　Because　of　the　special　structure　of　RPB,　the　hydraulic　characteristics　of　the　RPB　are　very　important.　In　this　study,　the　multiphase　flow　model　in　porous　media　of　the　RPB　is　presented,　and　the　dynamical　oil-water　separation　in　the　RPB　is　simulated　using　a　commercial　computational　fluid　dynamics　code.　The　operating　conditions　and　configuration　on　the　hydraulic　performance　of　the　RPB　are　investigated.　The　results　have　indicated　that　the　separation　efficiency　of　HIGEE　rotating　oil　purifier　is　predominantly　affected　by　operating　conditions　and　the　configurations.　The　best　inlet　pressure　is　0.002　MPa.　When　the　liquid　inlet　is　placed　in　the　outside　of　the　lower　surface　of　RPB;　oil　outlet　is　placed　in　the　upper　surface,　where　it　is　near　the　rotation　axis;　and　water　outlet　is　placed　in　the　middle　of　the　RPB,　where　it　is　far　away　from　the　oil　outlet,　the　separating　efficiency　is　the　best.