Composite　TiO2　nanotubes　with　Ag-doped　were　synthesized　for　the　first　time　using　the　alkaline　fusion　and　hydrothermal　method　under　ambient　atmosphere.　Compared　with　the　raw　materials　increased　2.3　times,　the　specific　surface　of　TiO2　nanotubes　was　82　m2/g　by　nitrogen　adsorption.　The　nanotubes　were　then　characterized　by　XRD,　TEM　and　XPS　techniques.　Research　demonstrates　that　metal　silver　and　silver　oxide　coexisted　in　the　composite　TiO2　nanotubes　which　were　composed　of　anatase　and　rutile.　Since　the　ratio　of　length　to　diameter　rose,　both　height　and　intensity　of　the　diffraction　peak　decreased　significantly.　UV-Vis　absorption　spectra　of　TiO2　nanotubes　were　shifted　by　40　nm　for　Ag-doped.　This　is　because　of　the　formation　of　Schottky　on　the　surface　of　TiO2　nanotubes　and　formation　of　impurity　level　between　TiO2　band　gaps.　Decrease　in　the　apparent　band　gap　contributed　to　the　migration　of　photoelectrons,　reducing　the　electron-hole　recombination.　The　acidic　active　sites　were　increased　by　the　hydroxyl　(-OH)　on　the　surface　of　TiO2　nanotubes,　which　enhanced　the　photo-oxidation　of　holes　in　the　valence　band.