Abstract: Using radio frequency plasma chemical vapor deposition equipment, taking methane as the gas phase carbon source and copper foil as the substrate, the graphene film coating was prepared, and the effects of temperature on its mechanical properties were studied. The results show that with the increase of the reaction temperature, the average friction coefficient of the copper-based graphene film shows a downward trend, and its microhardness and corrosion resistance both increase first and then decline. When the temperature is 750 ℃, the defect degree of the copper-based graphene film is relatively lowest, and the microscopic morphology flatness and coverage are highest; its average friction coefficient, microhardness and corrosion potential are 0.186, 113.6 HV and 0.805 V, respectively. At this time, the comprehensive mechanical properties of the sample reach a relatively optimal value.