A　series　of　ZrO2-Al2O3　mixed　oxides　with　La,　Ba　and　Y　were　prepared　by　co-precipitation　method　which　modified　by　surfactant.　The　samples　were　characterized　by　XRD,　XRF,　BET　measurements　and　CO　pulse　chemiadsorption.　The　effect　of　surfactant,　promoter　and　calcination　temperature　on　structure,　pore　structure　of　these　materials　and　dispersion　of　Rh　on　composite　supports　was　investigated.　It　was　found　that　compared　with　materials　prepared　by　conventional　co-precipitation　method,　the　samples　prepared　by　new　method　had　larger　specific　surface　area　and　pore　volume,　appropriate　pore　size　distribution.　No　matter　how　adding　La,　Ba　and　Y　separately　or　together,　phase　change　of　＂-Al2O3　to　a-Al　2O3　of　the　samples　was　inhibited　and　thermal　stability　of　the　composite　supports　and　Rh　was　improved　at　high　temperature.　In　particular,　high　dispersion　of　precious　metals　(D%　=17.82%)　of　the　catalyst　Rh/LBYZA　which　adding　La,　Ba　and　Y　together　was　achieved　after　calcination　at　1　100　＂　for　4　h.　The　catalyst　supported　on　LBYZA　after　calcination　at　600　＂　for　4　h　had　higher　catalytic　activity　for　NO　selective　reduced　by　CO.　Light-off　temperature　(7150%NO=240,　r50JCO=243)　and　Combustion　temperature　(;90%NO=273,;　90%　CO=280)　of　NO　and　CO　were　lower　than　the　catalysts　supported　on　y-Al2O3　and　other　ZrO　2　-Al　2　O　3materials.