The present invention relates to a method for manufacturing a coated orthodontic wire, and more particularly, to a method for manufacturing a coated orthodontic wire, in which the surface of a coated orthodontic wire, that is installed to connect teeth to each other to correct the alignment of the teeth, is etched, then plated with silver, and then coated with a polymer compound, so as to remarkably increase manufacturing speed and also allow the coating to be maintained for a long time due to the superior durability thereof. It may be expected from the above-mentioned configuration of the present invention and from the clinical results that there may be effects according to a method for manufacturing a coated orthodontic wire in that: a plurality of metal wires are fixed by using a jig, the metal wires are etched and plated in a state of being spaced apart from each other while only a required portion thereof is dipped into a container so that the manufacturing process is simple by virtue of not adding unnecessary processes, the manufacturing process is simple, only required portions of metal wires are etched, plated, and coated while the wires are fixed to be spaced apart from each other, and a low vacuum heat treatment step is performed one more time, thereby increasing the reliability of product quality. Since the polymer compound is completely coated through the low vacuum heat treatment step, the coated metal wire may be maintained for a long time even under a harsh oral environment.