The　α-Al2O3/Al4.59Si1.41O9.7/Al2TiO5　multiphase　material　with　high　performance　was　prepared　by　reaction　sintering.　The　influence　of　different　formulas　on　the　structures　and　properties　of　multiphase　material　was　investigated　to　determine　the　optimal　formula.　Crystalline　structure　and　cell　parameters　of　sintered　samples　were　characterized　by　XRD.　Microstructure　of　all　samples　was　observed　by　SEM.　The　properties　of　sintered　samples　were　investigated.　The　results　show　that　corundum　phase　(α-Al2O3),　mullite　solid　solution　phase　(Al4.59Si1.41O9.7)　and　aluminium　titanate　phase　(Al2TiO5)　were　formed　in　the　sintered　samples.　Different　formulas　would　not　change　the　symmetry　of　each　crystalline　phase,　but　caused　slight　change　in　their　cell　parameters.　The　optimal　formula　was　determined　to　be　coarse　corundum　of　36%,　fine　corundum　of　21%,　total　amount　of　three　kinds　of　clay　of　33%,　and　TiO2　of　12%,　which　possessed　a　comparatively　ideal　microstructure　and　optimal　properties.