Abstract: The Sr₃Al₂O₆:Eu²⁺,Dy³⁺ red-emitting phosphors were prepared by sol-gel method. The crystal structure were characterized by X-ray diffraction（XRD）. The excitation,emission and afterglow spectra were investigated by fluorescence spectrophotometer techniques. The results of XRD analysis show that Sr₃Al₂O₆ phase increases with the increase of calcined temperature,and the amount of SrCO₃ crystalline phase decreases. The excitation peak of Sr_2.95Al₂O₆:0.02Eu²⁺,0.03Dy³⁺ phosphor is at 473 nm,and samples have the similar emission spectra with peak at 612 nm attributed 4f⁶5d¹→4f⁷ of divalent europium under 1200℃. There is a new emission peak at 520 nm at 1250℃,due to the divalent europium activated by SrAl₂O₄phosphor. The sample with optimized properties is prepared at 1200℃ on the basis of comprehensive analysis.