Abstarct: Due to wide applications of cadmium sulfide (CdS) as a semiconductor material in this experimental research we have tried to deposit a thin nanostructure of this material on glass substrate by chemical bath deposition (CBD) method. In this study we have investigated various parameters including the deposition time duration, PH of the solution, molarity and the temperature of the acid in the solution, and finally the effect of chemical wet etching on physical properties of the samples. The synthesized samples were characterized by various techniques such as UV-Vis for their optical properties, X-ray diffraction (XRD) for structural properties, scanning electron microscopy (SEM) for surface morphology and Energy-dispersive x-ray spectroscopy (EDX) for chemical composition analysis of the laxyers. Our results show that the physical properties of the grown samples such as nanostructure morphology, structure (polycrystalline/amorphous) and the related optical properties parameters (absorption coefficient, band gap and band tail width) are very sensitive to the grown parameters. Thus by optimization of the growth conditions can lead to a desirable quality for this material for various applications.