A method for manufacturing a fiber reinforced plastic wire for a strength member of an overhead transmission cable, the method comprising:
- (S1) surface-treating a plurality of high strength fibers with a solution including a coupling agent;
- (S2) immersing a plurality of the surface-treated high strength fibers into thermosetting resin composition;
- (S3)-preparing a fiber reinforced plastic wire by heating the high strength fibers immersed into the thermosetting resin composition to cure the thermosetting resin;
- and
- (S4) winding the resultant fiber reinforced plastic wire.