Miniaturization　and　light　weight　of　aluminum　electrolytic　capacitor　can　be　achieved　via　the　enhancement　in　the　specific　capacitance　of　anodized　aluminum　foils　resulted　from　the　introduction　of　compounds　with　high　permittivity　into　dielectric　layer.　However,　the　electrostatic　repulsion　between　the　compounds　and　aluminum　substrates　hinders　this　introduction　of　the　compounds,　leading　to　a　limited　improvement　in　the　specific　capacitance.　In　this　work,　a　novel　strategy　has　been　developed　to　promote　the　deposition　of　TiO2　on　the　surface　of　aluminum　foils　by　surface　modification　with　polyvinyl　alcohol,　which　sharply　decreases　the　electrostatic　repulsion　and　dramatically　increases　the　mass　of　deposited　TiO2.　The　evolution　of　composition　and　morphology　during　the　process　are　studied　and　the　capacitor　performance　of　aluminum　foils　with　various　treatments　is　investigated.　Interestingly,　after　surface　modification,　a　specific　capacitance　of　131.5　mu　F　cm(-2)　under　the　withstanding　voltage　of　21.2　V　is　obtained,　and　there　is　about　60%　enhancement　in　the　specific　capacitance　compared　with　those　without　TiO2,　and　about　30%　enhancement　compared　with　those　without　surface　modification,　respectively.　The　specific　capacitance　obtained　is　the　highest　one　for　aluminum　electrolytic　capacitor　reported　to　date.　These　outstanding　performances　exhibit　great　potential　of　this　strategy　for　commercial　application　on　aluminum　electrolytic　capacitor.