Abstract: The Ca₉Al（Po₄）7:Eu³⁺ phosphor was synthesized by high temperature solid state reaction.It shows four group major emission peaks locating at 589nm and 593nm,612nm,616nm and 619nm,654nm and 688nm respectively that correspond to the ⁵D₀～⁷F₁,⁵D₀～⁷F₂,⁵D₀～⁷F₃ and ⁵D₀～⁷F₄ typical transition of Eu³⁺.The influence of the concentration of Eu³⁺ ions to the emission intensity was investigated and the concentration quench was happened when the concentration of Eu³⁺ ions was 5%.The role of charge compensation of Li+,Na+ and K+ions to the emission intensity was studied also.It was found that Li+ ions gave the best improvement to enhance the intensity of the emissions.The results show that Ca₉Al（Po₄）7:Eu³⁺,Li+ red-emitting phosphor is very suitable for white light emitting diode（w-LED） based on UV InGaN chip.