The Sr₄Al₁₄O₂₅:Mn⁴⁺ red phosphor was successfully prepared b y the trad itional high temperature solid-state method.The structure and properties were c haracterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and fluorescence spectrophotometer.The effects of sintered temperatures and Mn4+ -do ping concentrations on the luminescence properties were systematically investiga ted.The results show that as-prepared phosphors have an absorption spectrum fr o m the near ultraviolet to the broad blue region,and emit highly efficient red l ight with a central wavelength of 656nm,which is due to the spin-banned ²E_g→⁴A₂ transition of Mn⁴⁺ ions.Mn⁴⁺ ions may occupy the positions of the Al³⁺ in th e octahedron.When the doping concentration of Mn⁴⁺ ions is x=0.02and the calci nation temperature is 1200℃,internal quantum efficiency (IQ E) is the high est,up to 46.85%.The color coordinate of this phosphor is (0.716,0.284),and the emission spectrum is consistent well with the absorption peak of chlorophyll in the red region.Therefore,Sr₄Al₁₄O₂₅:Mn⁴⁺ can be used as red phosphors for white LEDs and plant-grown LEDs.