A novel red phosphor, LiSrBO3∶Sm3+, is synthesized by solid state reaction method, and the spectral characteristics are investigated. The emission and excitation spectra indicate that LiSrBO3∶Sm3+ phosphor can be effectively excited by near ultraviolet (UV) (404 nm), and exhibits a satisfactory red performance (599 nm), nicely fitting in with the widely applied UV chips. The effect of Sm3+ concentration on the emission intensity is studied, and the results show that the intensities reach the peak value at 3 mol% Sm3+. With doping Na+ or K+, the intensities are enhanced.