Rare　earth　luminescent　materials　demonstrate　significant　advantages　in　lighting　and　energy　saving,　and　detection　etc.　In　this　paper,　a　series　of　Ca2Ga2(Ge1-xSix)O7:y%Eu2+　phosphors　were　synthesized　by　high-temperature　solid-state　reaction　and　characterized　by　X-ray　diffraction　and　luminescence　spectroscopy　methods.　The　powder　X-ray　diffraction　patterns　reveal　that　all　the　phosphors　are　isostructural　with　a　space　group　of　P　(Formula　presented.)　21m.　The　excitation　spectra　of　Ca2Ga2(Ge1-xSix)O7:1%Eu2+　phosphors　exhibit　significant　overlapping　of　the　host　and　the　Eu2+　absorption　bands,　which　facilitates　Eu2+　absorbing　the　energy　to　increase　its　luminescence　efficiency　when　excited　by　visible　photons.　The　emission　spectra　show　that　the　Eu2+　doped　phosphors　have　a　broad　emission　band　with　a　peak　centered　at　510　nm　arising　from　the　4f65d1→4f7　transition.　Variable　temperature　fluorescence　reveals　that　the　phosphor　has　a　strong　luminescence　at　low　temperature　but　has　a　severe　thermal　quenching　effect　when　temperature　rises.　The　optimal　Ca2Ga2(Ge0.5Si0.5)O7:1.0%Eu2+　phosphor　shows　promise　for　application　in　the　field　of　fingerprint　identification　based　on　the　experimental　results.　©　2023　by　the　authors.