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AlN nanowire macro-arrays are successfully synthesized and characterized by the second template method. In the article we mainly research the process of preparing the AlN nanowire macro-arrays each with a certain orientation and uniform diameter by the chemical vapor deposition (CVD) method. Metal nanoparticles are prepared by CVD and self-assembled PS sphere templates, and then AlN nanowires macro arrays are compounded by the CVD on template and the metal nanoparticles on the template as a catalyst. The samples are observed by SEM and TEM, AlN nanowire macro-arrays have an area of about 0.3 mm x 0.2 mm, they are well distributed, and have an average diameter of about 41 nm, an average length of about 1.8 mu m, distributed density and coverage of large macro-hexagonal AlN nanowire arrays. So a method to controllably prepare AlN macroscopic nanowire arrays is obtained.