Ba3Bi2-x(PO4)4∶xTb3+ (x=0.05, 0.1, 0.15, 0.3, 0.4, 0.5) green phosphors were prepared by high-temperature solid phase reaction. Samples were analyzed by X-ray diffraction apparatus, scanning electron microscopy, spectrophotometer, and fluorometric spectrometer. The results show that all samples are Ba3Bi2(PO4)4 pure phase. The band gap of Ba3Bi1.7(PO4)4∶0.3Tb3+ is estimated to be 4.21 eV. At the excitation of 377 nm, the peak of emission spectra of samples are 543 nm, 584 nm, and 619 nm, corresponding to the energy level transitions of 5D4→7F5, 5D4→7F4 and 5D4→7F3 of the Tb3+ ions, respectively. As the doping concentration of Tb3+ ions increases, the luminous intensity of the sample increases first and then decreases. When x is 0.3, the luminous intensity reaches the maximum. The calculations indicate that the nearest neighbor ion plays a major role in the concentration quenching of Ba3Bi2-x(PO4)4∶xTb3+ phosphors. The luminous intensity changes little with the test temperature increases, indicating excellent thermal stability of the sample. The CIE chromaticity coordinate indicates that the prepared samples can emit green light when excited by UV light.