Three　Mn2O3　with　different　morphologies　and　particle　sizes　were　synthesized　using　MnBDC　as　precursor.　Interestingly,　the　morphology　and　size　of　MnBDC　can　be　easily　regulated　by　changing　the　reaction　solvents　slightly.　The　Mn2O3-L　catalyst　with　large　layers　and　small　crystal　size　exhibited　the　best　catalytic　activity　for　complete　oxidation　of　propane,　with　T50　of　266　degrees　C　and　T90　of　311　degrees　C　at　the　WHSV　of　120　L　g-1　h-1.　The　multilayered　structure　and　small　crystal　size　of　Mn2O3-L　allowed　it　to　possess　a　high　surface　area　and　more　interfacial　oxygen　defects　that　facilitated　oxygen　mobility,　improving　the　catalytic　activity.　It　seems　that　the　large　precursor　size　of　MnBDC-L　slowed　down　the　decomposition　rate　of　ligands,　promoting　the　formation　of　large　layered　structure　and　small　crystal　size　of　Mn2O3-L.　This　study　offers　a　simple　strategy　to　control　the　structure　and　crystal　size　of　Mn2O3　catalysts.