: The present work focuses on the synthesis of Pure and Copper doped Zinc oxide nanocomposites using the extraction of Ocimum sanctum. The nanocomposites were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray Diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-ray Analysis (EDAX). A methodical processing has been conducted on the result of Cu doped ZnO nanocomposite for the anticorrosion performance on the mild steel. The dimension of the proposed nanocomposites found to be 38 nm and was coated on mild steel in nickel bath solution. The corresponding anticorrosion on the coated mild steel was investigated in 3.5% NaCl solution by performing potentiodynamic polarization measurement and electrochemical impedance spectroscopy respectively. The surface morphology of the coated mild steel engrossed in corrosive solution was studied by SEM with EDAX. The Cu-ZnO nanocomposites coating has shown an ideal shield against corrosion and the defensive capability lye in the range of 95%. The prepared nanocomposites of Cu-ZnO nanocomposites have improved the process of mild steel in all corrosion media are subjected to further investigations in order to improve the quality of the composite for anticorrosion applications.