The invention belongs to the technical field of luminescent materials, and particularly relates to rare earth doping alkaline earth metal fluorine halidenano luminescent materials and a preparation method and application thereof. Reaction raw materials of the rare earth doping alkaline earth metal fluorine halidenano luminescent materialscan be directly purchased from a reagent company without further purification. A series of rare earth doping alkaline earth metal fluorine halide nanoparticles can be synthesized by the preparation method, synthesis conditions are easy to control, the size andmorphology of the synthesis nanoparticles are uniform, and the dispersion is good. Moreover, the preparation technology is simple, economy and environmental protection are achieved, operation is convenient, and high practicability is achieved.