Provided is a simulating metal biological-based composite base material, comprising a biological-based composite material, a repairing coating arranged on the surface of the biological-based composite material, a bottom layer arranged on the repairing coating, a composite coated film on the bottom layer, and a surface layer on the composite coated film. The surface of the simulating metal biological-based composite base material is as bright as a mirror and does not have orange peel, and binding force of the biological-based material/metal/repairing coating is good. The material has good corrosion resistance, and is resistant in thermal shock and high in water resistance. A separated layer or deformation and other abnormity would not occur to the material under various external force influence.