This　article　describes　a　simple　but　effective　method　to　dealuminate　and　realuminate　H-Beta　zeolite　as　a　catalyst　for　removing　organic　acids　from　bio-oils　via　their　esterification　reactions　with　alcohols.　A　series　of　modified　Beta　zeolites　were　prepared　by　mechanically　mixing　an　oxalic　acid　leached　Beta　zeolite　with　different　amounts　of　solid-phase　aluminum　fluoride　(AlF3)　and　calcinating　the　resulting　mixtures.　The　structure,　texture　property,　and　acidity　of　the　oxalic　acid　leached　Beta　zeolite　can　be　finely　adjusted　by　simply　changing　the　amount　of　AlF3　used.　Dealumination　and　realumination　could　simultaneously　take　place　via　the　interaction　of　Beta　zeolite　with　AlF3　when　the　content　of　AlF3　was　between　1.5　and　3.0　wt　%.　Only　dealumination　happened　when　the　content　of　AlF3　was　lower　than　1.0　wt　%　or　higher　than　4.0　wt　%.　The　catalytic　activities　for　esterification　reaction　of　sec-butanol　and　acetic　acid　showed　that　the　modified　Beta　zeolite　with　a　suitable　amount　of　AlF3　exhibited　much　higher　selectivity　than　the　oxalic　acid　leached　H-Beta　zeolite.