A series of red phosphors Sr1－xAl₂Si₂O₈:Eu ³⁺x,Li⁺0.03 were prepared by high temper ature solid-state reaction.Structure and luminescence properties of the Sr1－xAl₂Si₂O₈:Eu³⁺x,Li ⁺0.03 are studied.The samples are a pure phase of SrAl₂Si₂O₈,and they b elong to monoclinic system and C2/m (12) space group.Eu³⁺ and Li⁺ into the cr ystal matrix,which makes the lattice parameters (a,b,c) of the SrAl₂Si₂O_8slightly decr ease,only causes a slight distortion of the crystal structure.The excitation spectra are composed of a broad excitation ban d located at 220-580nm and a group of sharp peaks,and the strongest peak is 395nm (⁷F₀→⁵L₆).The emission spectra are located at 550－750nm,and present a number of sharp emission lines. The emission peak at 595nm is attributed to ⁵D₀→⁷F₁ ma gnetic dipole transition of the Eu³⁺,while the peak at 615nm is due to ⁵D₀→⁷F2electric dipole transition of the Eu ³⁺.The effect of the doping concentration of Eu³⁺ is investigated.The results show that the lu minescent intensity firstly increases and then decreases with the increase of Eu³⁺ concentrati on,and reaches the maximal value at Eu³⁺ concentration of 0.03in mole.The color coordinates of samples are almost with no change.The mechanism of concentration quenching is due to the dipole-dipole interaction.