Cu2O　is　an　environment-friendly　p-type　semiconductor　with　narrow　band　gap　(2.0　similar　to　2.2eV),　which　has　become　a　popular　sensitizer　of　TiO2.　The　present　work　is　focused　on　the　preparation　of　Cu2O/TiO2　nanotube　arrays　heterostructures　via　electrochemical　deposition.　TiO2　nanotube　arrays　were　prepared　by　anodic　oxidation　method　and　calcined　at　450.,　then　Cu2O　were　deposited　on　TiO2　nanotube　arrays　in　a　three-electrode　system　with　surfactants　PVP　in　electrolyte　at　different　deposition　potentials　(-0.2V　and-0.3V)　for　deposition　time　5min.　The　results　show　that　Cu2O　nanoparticles　deposit　on　TiO2　nanotube　successfully.　The　obtained　Cu2O　nanoparticles　were　quite　different　in　size　at　deposition　potential　-0.2V　and　-0.3V.　The　resulting　Cu2O/TiO2　nanotube　arrays　have　the　significant　photoresponse　in　visible　light　region.　Under　irradiation　of　solar　simulator　(AM1.5,　100mW/cm(2)),　the　photocurrent　density　of　the　Cu2O/TiO2　nanotube　arrays　when　Cu2O　was　deposited　at　a　voltage　of　-0.3V　is　more　than　that　of　pure　TiO2　nanotube　arrays.