The　epoxy　ethane　(EO)　stripper　is　important　equipment　which　could　make　epoxy　ethane　into　ethylene　alcohol　in　the　petrochemical　industry.　Widely　thin　area,even　dotted　pitting　and　holes　were　found　on　the　inwall　near　the　liquid　entrance　and　exit.　Those　would　give　rise　to　bad　influences　to　the　safe　service　of　the　equipment.　Computational　fluid　dynamics　(CFD)　methods　were　used　to　simulate　the　flow　field　of　a　tray,in　order　to　study　the　effect　of　flow　to　the　corrosion.　The　results　demonstrated　that　the　corrosion　area　was　consistent　with　the　fact.　In　addition,with　the　liquid　entrance　speed　increased,　the　wall　shear　stress　near　entrance　and　exit　increase,　the　corrosion　would　aggravate.　On　the　contrary,with　the　gas　speed　increased,　the　wall　shear　stress　near　the　entrance　increase,　the　corrosion　would　mitigate.　So,　the　speed　of　liquid　would　be　reduced　using　expanding　the　entrance　area　under　the　constant　flux　of　liquid,and　then　the　corrosion　damage　would　be　controlled.