In order to obtain yttrium aluminum garnet (YAG) transparent ceramics, YAG nano-powders were synthesized by co-precipitation method, and then sintered by wide-band laser after dry press forming. The YAG powders and the ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results indicate that pure phase of YAG nano-powders are obtained by calcining the precursor at 1100 ℃ for 2 h, and the YAG powders are nearly spherical and the average size of the particle is about 50 nm. YAG transparent ceramics with relative density of 99% were obtained by wide-band laser sintering, and the maximal transmittance was 32% in the visible light range.