The γ-Al2O3 was very suitable to be used as a catlalyst support and an adsorbent because of its vast surface.The γ-Al2O3with high surface area was mainly derived from its precursor boehmite (AlOOH).The porous AlOOH was synthesized by sol-gel method using alumina nitrate and sodium hydroxide as main raw materials.The fasciculate porous alumina was obtained by heat with AlOOH treatment.And it was characterized by XRD,SEM and N2 adsorption-desorption technique.