The invention discloses a method for embedding precious metal nanoparticles into a rare earth doped luminescent material. Under the heat effect of precious metal nanostructure plasmons, small-sized precious metal nanoparticles with large absorption cross section are taken as a heat source, the nanoparticles produce high heat within quite short time under the action of an externally applied light field, and the precious metal nanoparticles grow rapidly and are embedded into the rare earth doped luminescent material. The effective action range of the plasmons on the surfaces of the precious metal nanoparticles is expanded greatly, scattering cross section of the precious metal nanoparticles is increased, regulation efficiency of the plasmons for fluorescent radiation of a system is improvedgreatly, and luminescence property of the material is regulated effectively. Reaction time is short, required power density of exciting light is low, the method has wavelength dependence characteristic, exciting light wavelength can be adjusted linearly by regulating position of a formant of the plasmons of the precious metal nanoparticles, meanwhile, crystallinity of the luminescent material is improved, and fluorescence emission performance of the material is further optimized.