A　series　of　La1-xRbxMnO3　perovskite　catalysts　(x　=　0,　0.1,　0.2,　0.3)　were　prepared　by　solvothermal　method　and　characterized　by　means　of　XRD,　FT-IR,　SEM,　XPS　and　H2-TPR;　their　catalytic　performance　in　the　simultaneous　removal　of　NO　and　soot　was　investigated　in　a　fixed-bed　micro-reactor.　The　results　show　that　the　La1-xRbxMnO3　catalysts　have　a　single　perovskite　structure　and　the　Mn　species　exist　in　the　form　of　Mn3+　and　Mn4+.　In　comparison　with　LaMnO3,　when　La3+　is　partially　substituted　by　Rb+,　more　high-valence　Mn4+　and　oxygen　vacancies　are　formed　in　La1-xRbxMnO3,　which　can　improve　the　redox　properties　and　enhance　the　catalytic　performance　of　La1-xRbxMnO3.　With　the　increase　of　Rb+　content　in　La1-xRbxMnO3,　the　conversion　of　NO　increases　and　the　soot　combustion　temperature　decreases.　For　NO　and　soot　removal　over　La0.7Rb0.3MnO3,x　=　0.3,　the　peak　CO2　formation　temperature　(tmax)　is　430,　with　a　selectivity　of　99.0%　to　CO2;　at　429,　the　maximum　conversion　of　NO　reaches　59.7%.　©　2019,　Science　Press.　All　right　reserved.