In this paper, Pt nanowires were prepared by the alternating current deposition method using porous anodic alumina as templates.The organization morphology, crystal structure and chemical state of Pt nanowires were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively.The electro-catalytic performance of Pt nanowires was further analyzed by cyclic voltammetry (CV) and timing current (i-t) method in potassium hydroxide solution.The results show that the diameter of Pt nanowires is about 65-75 nm, radial surfaces of nanowires present burr state.Pt nanowires are polycrystalline structure and simple substance.Pt nanowire electrode has higher electro-catalytic oxidation activity for methanol in alkaline medium than in acid medium and is about 1.38 times higher than the standard Pt/C catalyst (JM company).Moreover, the catalytic mechanism is briefly analyzed.