Abstract: Cu/TiO₂ nanotube arrays/Ti-based composite films were fabricated by direct current electro-deposition with or without ultrasound,and then elemental copper will be oxidized to copper oxide by electro-oxidation in NaOH solution.Finally,CuO/TiO₂ nanotube arrays/Ti-based composite films were made.The morphology and the structure of CuO/TiO₂ nanotube arrays/Ti-based composite films were characterized respectively by means of SEM and XRD.The effects of electroplating process parameters（current density） and ultrasound on the composite films morphology were investigated.At the same time,the optical properties of dye-sensitized solar cells composed of composite film electrode were studied through the steady-state photocurrent technique.The results showed that the dye-sensitized solar cell,composed with composite films prepared in the process parameters（3mA/cm²,5min） without ultrasound aided,exhibits the best performance with the short-circuit photocurrent density（J_sc） 9.00mA/cm²,the open-circuit photovoltage（V_oc） 0.664V,fill factors（FF） 0.512,and the photo-current conversion（η） 3.06%;Under the same condition,the dye-sensitized solar cell which was composed with composite films prepared in the process parameters（3mA/cm²,5min） with ultrasound aided,exhibits the best performance with the short-circuit photocurrent density（J_sc） 15.50mA/cm²,the open-circuit photovoltage（V_oc） 0.688V,fill factors（FF） 0.505,and the photo-current conversion（η） 5.39%.By contrast,the optical properties of conditions of ultrasound-aided are better than without ultrasound-aided,and the process parameters of the best optical performance moved from 3mA/cm² to 6mA/cm².