Eu 3+ doped La 3 PO 7 nanoparticles were successfully synthesized under facial combustion method. The nano-phosphors then were characterized by some techniques including X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), photoluminescence spectrum (PL), and lifetime decay. SEM and TEM micrographs reveal exhibit of the La 3 PO 7 : Eu 3+ nanopowders in spherical morphology with an average size of about 20 nm, matching with Scherrer's formula calculation. Otherwise, the influence of annealing temperature and concentration of Eu 3+ ions on optical characteristics of Eu 3+ was doped La 3 PO 7 , and optical properties were investigated too. The photoluminescence shows the strong red emission originating from the 5 D 0 ¼ 7 F J (J = 1, 2, 3, and 4) transitions of Eu3+ and the 614 nm emission from the 5 D 0 ¼ 7 F 2 electronic dipole transition is dominant.