Abstract: Using aluminum alkoxide as raw material,pore diameters of mesoporous alumina were adjusted by three different templates.The role of template was discussed.Results show that the structures of mesoporous alumina obtained with different templates are all wormlike.Without template small pore diameter and narrow pore distribution can be observed in the obtained mesoporous alumina.With ionic type templates mesoporous alumina with larger pore diameter and narrow pore distribution is obtained.When using a nonionic type template,the pore diameter in the mesoporous alumina is larger;meanwhile the pore size distribution is wider.