The cadmium oxide (CdO) thin film has been deposited onto stainless steel substrate by using electrodeposition method. 0.1 M CdO solution used for good quality deposition, and then optimized preparative parameter like electrolytic bath concentration, deposition time, current density and pH of electrolytic solution shown yellowish colour film. The x-ray diffraction (XRD) analysis of the deposited film showed presence of polycrystalline with cubic structure. Optical absorption studies reveal that the values of absorption coefficient is in the order of 104 cm-1 , indicating direct band to band transition with band gap energy 2.2 eV , close to it?s value of intrinsic band gap energy. The surface morphology studies by scanning electron microscope (SEM) , shows that the deposited film are well adherent and grains are uniformly distributed over the surface of substrate.