Transparent plastic and metal injection molding combined preparation method, composite part and mobile terminal

The invention provides a transparent plastic and metal injection molding combined preparation method, a composite part and a mobile terminal, and relates to the technical field of metal and plastic combination. The preparation method comprises the steps that micro-arc oxidation treatment is conducted on the metal surface, so that a micro-arc oxidation film with nanometer micropores is formed on the metal surface; plasma coating sealing treatment is conducted on the metal surface, and a plasma film layer is formed on the surface of the micro-arc oxidation film; and putting the metal into a mold, injecting transparent plastic, performing injection molding treatment, and performing injection molding on the surface of the plasma film layer to form a transparent plastic layer to obtain the composite part. According to the preparation method for injection molding combination of the transparent plastic and the metal, the plasma film layer permeates into the nano-micropores, so that the transparent plastic and the me