Abstract: In view of many problems existing in the application of LED commercial phosphors in powder blending, the blue light of 450 nm is selected as the excitation wavelength, and many LED commercial phosphors produced by five enterprises in the market are taken as the research objects, and their emission spectra and excitation spectra are deeply studied. The experimental results show that the luminous intensity of different kinds (or colors) of the same enterprise is in a big difference, the luminous intensity of the same color and different peak wavelength is very different, and the luminous intensity of the same color of different enterprise is also quite different.In order to solve the above problems, according to the principle of spectral design, the actual structure of luminous spectrum and the needs of the whole photoelectric color performance, the technical design idea and powder blending scheme of LED phosphor in the application of high performance LED light source are put forward.