SBA-15　and　Ce-SBA-15　molecular　sieves　were　synthesized　by　microwave　assistant　sol-gel　method　with　nonionic　triblock　co-polymer　surfactant　P123　as　the　template　and　tetraethyl　orthosilicate　as　the　silicon　source,　and　were　characterized　by　means　of　XRD,　XPS　and　UV-Vis　DRS.　The　results　showed　that　ordered　degree　of　Ce-SBA-15　molecular　sieves　was　higher　than　that　of　SBA-15　molecular　sieves　and　the　cerium　species　existed　in　the　forms　of　both　Ce4+　and　Ce3+.　With　CO　oxidation　as　the　model　reaction,　the　influences　of　Ni　promoter　on　the　catalytic　performances　of　the　Pt-based　catalysts　supported　on　both　the　synthesized　molecular　sieves　were　investigated.　The　results　showed　that　the　activity　of　Pt/Ce-SBA-15　was　better　than　that　of　Pt/SBA-15,　and　adding　the　Ni　promoter　further　enhanced　the　catalyst　activity.　The　complete　oxidation　of　CO　was　realized　at　160°C　over　Pt-Ni/Ce-SBA-15　catalyst.　To　reach　the　same　conversion,　the　reaction　temperature　has　to　be　at　245°C　in　the　case　of　Pt/SBA-15.