SrAl2Si2O8∶Eu2+(SASO∶Eu2+) series phosphors were prepared by high temperature solid-state method. The crystal structure, excitation spectrum, emission spectrum and thermal stability of phosphors were studied in detail. The results show that under 337 nm excitation, the emission spectrum is an asymmetric broadband single peak with a peak wavelength of 404 nm, a peak half-height width of about 53 nm, and the optimal doping molar concentration of Eu2+ is 5%. According to Dexter theory, it is discussed that the quenching of SASO∶Eu2+ phosphor concentration is caused by the interaction between Eu2+electric dipole to dipole. When heated to 225 ℃, the intensity of SASO∶0.05Eu2+ phosphor still has 97.4% of the intensity at the initial room temperature, indicating that it has excellent thermal stability.