TiO　2-based　nanotubes　(TiO　2NT)　were　synthesized　by　hydrothermal　treatment　under　the　alkaline　conditions　using　P25　as　the　raw　material.　Then　copper　phthalocyanine　(CuPc)　was　chosen　as　a　sensitizer　to　prepare　CuPc　modified　TiO　2NT　composite　material　(CuPc/TiO　2NT)　by　the　immersion　method.　The　structure　and　properties　of　the　samples　were　characterized,　and　the　photocatalytic　activity　of　pure　TiO　2NT　and　CuPc/TiO　2NT　was　also　evaluated　by　degradating　rhodamine　B　under　the　visible　light.　The　results　showed　that　the　TiO　2NT　had　large　surface　area　(362.6　m　2/g)　and　high　pore　volume　(2.039　cm　3/g).　Even　after　modified　by　CuPc,　the　composite　material　still　kept　the　high　surface　area　(244.2　m　2/g)　and　pore　volume　(1.024　cm　3/g)　for　0.2%CuPc/TiO　2NT.　The　recombination　of　photo-injected　electrons　decreases　based　on　the　effective　charge　separation　on　the　interface　of　TiO　2NT　and　CuPc,　improving　the　transfer　efficiency　of　the　photo-excited　charges　under　visible　light.　Furthermore,　the　catalyst　exhibited　obvious　visible　photocatalytic　activity　after　sensitized　by　CuPc.　As　the　mole　percentage　of　CuPc　was　0.2%　in　the　composite,　the　degradation　rate　of　rhodamine　B　over　0.2%CuPc/TiO　2NT　could　reach　59%,　increasing　by　3.3　times　compared　with　pure　TiO　2NT　after　reaction　for　180　min.