La2Mg1–x/2Zr1–x/2O6:xBi3+　(x　=　0.01–0.035,　abbreviated　as　LMZ:Bi3+)　and　La2–yMg0.99Zr0.99O6:0.02Bi3+,yEu3+　(y　=　0.1–0.11,　abbreviated　as　LMZ:Bi3+,Eu3+)　double-perovskite　phosphors　were　prepared　through　high-temperature　solid-phase　method.　The　emission　spectrum　of　LMZ:xBi3+　(x　=　0.01–0.035)　phosphors　excited　at　353　nm　is　asymmetric　in　the　range　between　375　and　650　nm,　showing　strong　green　light.　There　are　two　luminescent　centers　of　[Mg1/Zr2–O6]　and　[Mg2/Zr1–O6]　for　Bi3+　occupation,　which　were　analyzed　through　different　excitation　wavelengths,　Gaussian　fitting　peaks,　fluorescence　decay　curves　and　Rietveld　refinement　of　powder　X-ray　diffraction　data.　Through　deep　study　of　the　luminescent　lattices　in　the　LMZ　matrix,　the　green　to　blue　tunning-emission　is　observed　by　different　excitation　wavelengths.　In　addition,　red　emission　is　obtained　by　co-doping　Bi3+/Eu3+,　and　adjustable　emission　was　investigated　by　changing　the　content　of　Eu3+　in　the　co-doped　phosphor　formulation,　so　it　is　converted　from　green　emission　to　red　emission.　The　above　results　demonstrate　how　to　tune　emission　color　by　co-doping　rare　earth　ions　in　the　double　perovskite　phosphor,　which　is　attractive　for　future　applications.　©　2022　Chinese　Society　of　Rare　Earths