The micron-sized Sr 2(P2O7):Ce,Tb green phosphors were prepared by being annealed at different temperatures with its precursors synthesized by co-precipitates of(NH4) 2HPO4 at ambient temperature. The phase structure, grain size, surface morphology, and luminescent properties of phosphors were investigated by X-ray diffraction, scanning electron microscope, transmission electron microscope, and fluorescence spectrum. The results show that the product of precursor annealed at 1,100 °C is Sr 2(P 2O7):Ce,Tb, which belongs to orthorhombic phase. The powder is spherical and the size distribution is in micron grade. The sample with the molar ratio of Sr/Tb/Ce of 100.0:0.4:0.6 shows the best fluorescence effect annealed at 1,100 °C for 3 h. The phosphors produce green fluorescence by being excitated with ultraviolet radiation of 254 nm wavelength, and the main emission peak is at 547 nm. The Sr 2(P2O7):Ce,Tb phosphors synthesized by co-precipitation method of precursors at ambient temperature is a kind of efficient green-emitting phosphors. The micron-sized Sr 2 (P2O7): Ce, Tb green phosphors were prepared by being annealed at different temperatures with its precursors synthesized by co-precipitates of (NH4) 2HPO4 at ambient temperature. The phase structure, grain size, surface morphology, and luminescent properties of phosphors were investigated by X-ray diffraction, scanning electron microscope, transmission electron microscope, and fluorescence spectra. The results show that the product of precursor annealed at 1,100 ° C is Sr 2 (P 2 O7): Ce, Tb, The belongs to orthorhombic phase. The sample with the molar ratio of Sr / Tb / Ce of 100.0: 0.4: 0.6 shows the best fluorescence effect annealed at 1,100 ° C for 3 h The phosphors produce green fluorescence by being excitated with ultraviolet radiation of 254 nm wavelength, and the main emission peak is at 547 nm. The Sr 2 (P2O7): Ce, Tb phosphors synthesized by co-precipitation method of precursors at ambient temperatu re is a kind of efficient green-emitting phosphors.