A method for preparation of a composite composition (1,2) involves performing magnetron sputtering deposition to nanolize at least one target such as silver or titanium dioxide or zinc oxide and to deposit the target over surfaces of a plastic matrix (11,21), so as to obtain a composite matrix (10), and using pressing or blowing or injection forming to make the composite matrix (10) into a composite composition (1,2). Thereby, the method ensures that the target is evenly distributed over the film, making it a composite composition (1,2) that is antibacterial, capable of generating anions and far infrared rays or highly ventilative.
