A　new　type　of　double　pore　size　activated　alumina/activated　carbon　multiphase　material　was　made　by　using　waste　aluminum　slag　and　activated　carbon　as　main　raw　materials.　The　microstructures　and　pore　size　distribution　of　the　new　material　were　characterized　by　SEM　and　BET　techniques.　Iodine　adsorption　value　was　used　to　evaluate　the　adsorption　performance　of　the　multiphase　materials,　and　the　benzene　adsorption　capability　was　also　measured.　The　results　show　that　the　specific　surface　area　of　the　activated　alumina/activated　carbon　multiphase　materials　is　261.95　m(2)/g,　pore　volume　can　reach　0.25　m(3)/g,　and　the　iodine　adsorption　value　is　381.97　mg/g.　BET　pore　size　distribution　shows　that　micropores　and　mesopores　both　exist　in　the　composite　material.　The　micropores　range　from　0.6　to　1.4　nm,　and　the　mesopores　range　from　3.0　to　7.0　nm.　The　benzene　adsorption　capability　of　this　new　material　is　excellent,　with　a　saturated　adsorption　capacity　of　241.00　mg/g,　much　better　than　that　of　pure　activated　alumina　or　activated　carbon.