The invention relates to a preparation method for the nickel molybdate nanotube / nano wire coexisting structure, uses ammonium molybdate and nickel chloride as reaction raw material, uses distilled water as reaction solvent and prepare nickel molybdate one-dimensional tubular and linear nanostructure by means of microwave radiation technology. Thereinto, the nanotube external diameter of the nickel molybdate nanotube / nano wire coexisting structure is 50 to 100 nanometers and the thickness of the single sidewall is 10 to 20 nanometers, the diameter of the nano wire material is 15 to 25 nanometers and the length can reach 0.5 to 2.0 micrometers. In preparation process, the technology avoid large heating process temperature gradient, low reaction efficiency, demanding operation condition and other series problems in a conventional synthetic method to make the preparative target product have uniform size and structured structure. The nano material prepared by employing the invention has large specific surface area and high chemical activity and other characteristics and is expected to take as catalyst, electrode material or lubricant additive material with excellent performance.