BaTiSi2O7　have　a　unique　TiO5　pyramid　polyhedron　in　its　lattice,　which　is　beneficial　to　control　the　dielectric　loss　induced　by　the　relaxation　of　ion　polarization.　In　this　paper,　BaTiSi2O7　ceramics　was　prepared　using　the　conventional　solid　oxide　reaction　method.　X　ray　diffraction　and　Raman　scattering　spectra　affirm　the　BaTiSi2O7　pure　phase　and　existence　of　TiO5　pyramid　structure.　Besides,　the　microwave　dielectric　measurement　shows　that　the　dielectric　permittivity　varies　in　8　similar　to　10　and　dielectric　loss　lowers　to　10(-4)　as　the　sintering　temperature　increases　to　1145　degrees　C.　The　low　dielectric　loss　of　the　BaTiSi2O7　ceramics　indicates　its　potential　application　as　microwave　dielectric　materials　with　low　dielectric　permittivity　and　loss.