Fibre and the application thereof on reinforcement material are disclosed. The fibre is composed of a fibre main body and a bond layer grafted on the outer surface of the fibre main body. The invention further discloses a fibre fabrication method, including the following steps: providing the fibre main body; providing bond composite used to form a bond layer, including monomer, initiator and any selected solvent water; coating or infusing the bond composite to the fibre main body; and heating, so as to enable the bond composite to have chemical reaction. In this way, a bond layer can be grafted on the surface of the fibre.