Abstract: The CaAl2B2O7 :Eu3+ crystallite was synthesized by the high temperature solid state reaction.X-ray diffraction pattern shows that pure CaAl2B2O7 matrix was obtained. The sample can emit red light under near-ultraviolet (UV) and blue Light excitation. The emission spectrum shows the most intense peak is located at 614nm, which corresponds to the 5D0→2F2 transition of Eu3+. The crystallite has two main excitation peaks located at 401nm and 471nm, which match the emission of UV and blue lightemitting diode (LED) respectively. The effects of charge compensations and the concentration of Eu3 + on the emission intensity were also investigated. The co-doped K+, Na+ and Li + can all lead to the strongly enhanced luminescence of CaAl2B2O2: Eu3+. The sample doped by Li+ has the highest emission intensity. The optimum concentration of Eu3+ is 6;. The CaAl2B2O7 :Eu3+ crystallite is a potential redemitting phosphor for white light-emitting diode.