Two　new　rare-earth　orthoborates　Ba2CdLn2(BO3)4　(Ln　=　Tb,　Eu)　were　prepared　by　the　high-temperature　solution　reactions　at　950　degrees　C.　The　single-crystal　XRD　analyses　showed　that　they　crystallized　in　the　monoclinic　space　group　P21/c　and　the　crystal　structures　consisted　of　3D　networks　constructed　by　CdO5　square　pyramids　(CdO6　monocapped　square　pyramids),　Tb(Eu)On　(n　=　7,　8)　polyhedra　and　BO3　planar　triangles,　with　open　channels　accommodating　Ba2+　cations.　The　IR　and　Raman　studies　supported　the　presence　of　BO3　groups　in　the　structures　and　the　UV-vis　absorption　measurements　showed　the　typical　Tb3+　and　Eu3+　absorption　bands　arising　from　their　unpaired　4f　electrons.　In　addition,　solid　solutions　Ba2CdTb2-2xEu2x(BO3)4　(0　＜　x　＜　0.2)　were　prepared　via　the　solid-state　reaction　method.　By　doping　Eu3+　into　the　Ba2CdTb2(BO3)4　host　and　varying　the　doping　concentration　of　Eu3+,　tunable　colors　from　green　to　orange　and　eventually　to　red　were　obtained　in　the　Ba2CdTb2-2xEu2x(BO3)4　phosphors　under　the　excitation　at　377　nm.　The　energy　transfer　process　from　Tb3+　to　Eu3+　was　verified　through　luminescence　spectra　and　fluorescence　decay　curves.　The　above　results　indicated　that　the　Ba2CdTb2-2xEu2x(BO3)4　phosphors　may　find　potential　applications　in　the　field　of　displays　and　lighting.