In order to improve the shortages of the phosphor for white LED, including low efficiency, poor uniformity, large light decline, short life, and poor physical and chemical characteristics, etc., single crystals phosphor was studied as a substitute. Growth and spectra characteristics of Ce doped and Ce, Pr-codoped YAG single crystals phosphor used for white LED were investigated. Ce∶YAG and Pr,Ce∶YAG single crystals were grown by Czochralski method, and its luminescence properties were studied by means of absorption, emission and excitation spectra. Date analysis reveals that broad emission band ranging from 480~650nm, is produced with blue light excitation. It has been found that red light component of Ce∶YAG phosphor, which is important to improve the color rendering index, can be efficiently compensated by Pr-codoping.