Abstract: The present disclosure provides a method for manufacturing a graphene-metal composite wire. The method includes: (1) growing graphene on a surface of a metal wire through a chemical vapor deposition process; (2) twisting the wire; (3) pretensioning and pre-straining the wire; (4) cold-drawing the wire; and (5) subjecting the wire to a chemical vapor deposition process, wherein the wire is subjected to steps (2) to (5) successively and cycled n times, wherein f wires obtained in step (1) are used in the first cycle, f wires obtained from previous cycle are used in subsequent cycle, and finally a graphene-metal composite wire with fn strands is obtained, and wherein (a) f is an integer of 2-9; and (b) n is an integer of 6 or more.