Abstract: A method of fabricating micro/nano optical wires is disclosed, which comprises: providing a micro/nano optical wire drawing device comprising a feeding wheel, a drawing wheel, and a heating unit; fastening one end of a micrometer-sized preform at the feeding wheel; making the other end of the preform pass through the heating unit and be fastened at the drawing wheel; and switching on the heating unit to heat the perform to a softening temperature of the preform and drawing the preform by the drawing wheel to form a micro/nano optical wire. A device of fabricating micro/nano optical wires is also disclosed.