The Na+, Dy3+, Eu3+ doped YAG series phosphors were prepared by high-temperature solid-phase method. Change the doped Dy3+ concentration, excitation wavelength, and doped Na+ to study its influence on luminescence. X-ray diffraction results show that the doping of boric acid, Na+, Dy3+, Eu3+ does not affect the cubic phase of YAG, and with the increase of Na+, Dy3+, Eu3+ concentration, the sample diffraction peak position shifts to a small angle. Use λem=590 nm to monitor Dy3+, 15%Eu3+ co-doped YAG powder, with the increase of Dy3+ concentration, the excitation intensity of Eu3+ and Dy3+ both increase first and then decrease. When λex=366 nm is used to excite Dy3+, 15%Eu3+ co-doped YAG, at this time, there is an energy transfer of Eu3+→Dy3+, the calculated energy transfer efficiency of Eu3+→Dy3+ is 84.23%.Compared with 10%Dy3+, 15%Eu3+ co-doped YAG, the Dy3+ luminescence in the sample is enhanced by 1.5 times after doping 0.5%Na+, the color coordinate is (0.348 1,0.397), and the color temperature is 5 010 K, which is close to standard white light. When λex=394 nm is used to excite Dy3+, 15%Eu3+ co-doped YAG, at this time, there is energy transfer from Dy3+→Eu3+, the calculated energy transfer efficiency of Dy3+→Eu3+ is 88.9%. Compared with 10%Dy3+, 15%Eu3+ co-doped YAG, Eu3+ luminescence is enhanced 1.8 times after doping 0.5%Na+, the color coordinate is (0.466 7, 0.416 8), and the color temperature is 2 650 K, which meets the commercial warm white light standard.