The invention discloses a europium ion Eu 3+ Activated fluoroantimonate orange-red phosphor and preparation method thereof, chemical formula is Ca 4 Sr 3‑3x Eu 3x [Sb 12 o 36 ]F 2 , where the active ion is europium ion Eu 3+ , x is Eu 3+ doped Sr 2+ The molar ratio of bits, 0.025≤x≤0.6. The phosphor powder prepared by the invention has small particles and uniform distribution, good dispersion, good crystallinity, high luminous efficiency, good stability, and purer orange-red fluorescence chromaticity; Under the excitation of ultraviolet light, it emits pure orange-red light, and the luminous wavelength is mainly 590nm. It can be widely used as a fluorescent material for preparing white light LEDs; during preparation, the compounds containing the elements required for the synthesis of luminescent materials are mixed in proportion, and the high-temperature solid-phase method is used. The preparation is prepared by repeated calcination, and has the advantages of simple preparation method, low requirement for equipment, and environmental friendliness.