One object of the invention is to solve the existing dual acid-bit poor stability of ionic liquids, modified or limited the application of ionic liquids, and the raw materials are expensive, difficult to control the reaction and other technical issues and provide a dual acid bit TSILs, a dual acid-bit TSILs present invention, imidazole abandon expensive raw materials, selection of cheap and readily available starting materials alkyl amines, and avoid the use of water-sensitive metal chloride, but as a stable acidic metal oxide source, and ionic liquids reported in the literature structure has obvious advantages, including: a stable, inexpensive and mild preparation conditions