Li+, Na+ co-doped (YxGdyLu1-x-y)2O3∶05%Pr3+ phosphors were synthesized with a high temperature solid-state reaction. The structures of the samples were characterized by XRD. The excitation spectra, emission spectra and fluorescence lifetime of the samples were measured and analyzed using a fluorescence spectrophotometer. The results show that they are still the cubic phase of the matrix for Li+, Na+ , doped (YxGdyLu1-x-y)2O3∶ Pr3+ samples. The doping of Li+ and Na+ in a single matrix can effectively improve the grain size while the doping of Li+ and Na+ in a composite matrix not only effectively improves the grain size, but also causes the sample to become ceramic. Under excitation at 272 nm, the powder samples present strong red emissions of Pr3+ at 632 nm. Under different conditions, (Y0.05Gd0.05Lu0.9)2O3∶ 05%Pr3+, 25%Li+, 1%Na+ fluorescent powder obtained by calcination at 1 000 ℃ for two hours has the strongest luminescence, while the lifetime of the sample is shorter.