The invention discloses a Eu3+doped 
tantalite red fluorescent 
powder and a preparing method and application therefore. The fluorescent 
powder is La2-2xEu2xTa12O33, wherein x is the Eu3+doped chemical metering 
score and is larger than or equal to 0.001 and smaller than or equal to 0.20, the high-temperature 
solid phase method is adopted, 
rare earth ions are added, and the Eu3+doped 
tantalite red fluorescent 
powder is prepared. The Eu3+doped 
tantalite red fluorescent powder can be effectively excited by 
near ultraviolet light and 
blue light nearby 250 nanometers to 475 nanometers, the emission 
wavelength of the Eu3+doped tantalite red fluorescent powder and the emission 
wavelength of a near-
ultraviolet LED 
chip are quite coincident, and under excitation of the 
near ultraviolet light, the fluorescent powder can emit bright 
red fluorescence, the emission 
wavelength is mainly 612 nanometers, and the 
red fluorescence has the quite-wide excitation spectrum and the quite-wide 
luminescence spectrum; the obtained 
granularity is even, the luminous efficiency is high, the 
chemical stability is good, 
toxic gas such as 
sulfide cannot be generated under 
ultraviolet radiation, the environment is friendly, and the Eu3+doped tantalite red fluorescent powder can be applied to 
white light LED and the other luminous fields; in the preparing process, compounds with elements required by 
synthetic materials are mixed in proportion, the high-temperature 
solid phase method is adopted, the technology is simple, the Eu3+doped tantalite red fluorescent powder is free of 
pollution, 
environmentally friendly and suitable for industrial production.