Abstract: Homogeneous and ordered nanoporous anodic alumina temple （PAAT）were prepared by twice-anodic oxidation, The morphological、 structural and optical properties of the obtained PAAT were char-acterized and analyzed. The absorption spectrum of PAAT shows that one sharp peak centers at 250nm and PAAT is transparent in the visible light wavelength region. Photoluminescence（PL）spectra show that PL band lies in 450-550nm with PL peak centers at 460 nm.