Nanostructured conducting polymer/metal composites have attracted much attention due to their unique properties. Polypyrrole (PPy) nanotubes were first synthesized via a self-degraded template and then used as Supports for ill situ reduction of Ag+ ions. Ag nanoparticles could be uniformly assembled onto the PPy nanotube surface to get PPy/Ag composite nanotubes. The formation mechanism, morphology and structure of the nanocomposites were Studied by transmission electron microscopy, thermogravimetric analysis, and X-ray diffraction. The one-dimensional hollow nanocomposites showed improved properties.