Production and characterization of copper oxide photocathode by high temperature anodizing method for use in photoelectrochemical water splitting solar cells photoelectrochemical water splittingis a sustainable and environmentally compatible method for producing hydrogen and converting solar energy. In this regard, copper-based metal oxide photocathodes are due to high frequency, low cost, low band gap and good light absorber. The sun seems to fit. In this research, the copper hydroxide film was formed by different temperature anodizing and then annealed with heat treatment to form copper oxide on copper substrate. The parameters used to form the hydroxide and copper oxide film, the anodizing temperature, the bath pH, ??and the applied potential in the anodizing process and the annealing temperature, also the effect of these parameters on the photoelectrochemical properties of the sample was investigated. Levels of parameters and results of analysis of LSV results were carried out using RSM test design and in full factorial method. To evaluate morphology and surface analysis, electron microscopy and X-ray diffraction analysis of EDS were used. The results showed that nanoparticle morphology was formed on the surface of copper and in the form of Cu2O and CuO3 copper oxide with thicknesses of about 1 to 2 micrometers. X-ray diffraction (GXRD) test was used to study the phases created in the surface film. The results indicated that in the anodic temperature of 100 ° C and at 35.9 pH, the growth of Cu2O copper oxide increased (111). The optical properties and photoelectrochemical properties of the samples were evaluated using solid UV analysis and linear voltammetric scanning. In addition, electrochemical impedance and heat loss were used to study the transfer of electrical flux from a dual layer in the dark and under light exposure. It was observed that the sample had an elevated photochemical and superficial properties with anodizing temperature of up to 100 degrees and a pH of 35.9.